diff --git a/visual_console_client/src/Item.ts b/visual_console_client/src/Item.ts
index 7ad0f779d6..e09017d6df 100644
--- a/visual_console_client/src/Item.ts
+++ b/visual_console_client/src/Item.ts
@@ -1,4 +1,10 @@
-import { Position, Size, UnknownObject, WithModuleProps } from "./types";
+import {
+  Position,
+  Size,
+  AnyObject,
+  WithModuleProps,
+  ItemMeta
+} from "./lib/types";
 import {
   sizePropsDecoder,
   positionPropsDecoder,
@@ -9,7 +15,7 @@ import {
   humanDate,
   humanTime
 } from "./lib";
-import TypedEvent, { Listener, Disposable } from "./TypedEvent";
+import TypedEvent, { Listener, Disposable } from "./lib/TypedEvent";
 
 // Enum: https://www.typescriptlang.org/docs/handbook/enums.html.
 export const enum ItemType {
@@ -52,14 +58,14 @@ export interface ItemProps extends Position, Size {
 // FIXME: Fix type compatibility.
 export interface ItemClickEvent<Props extends ItemProps> {
   // data: Props;
-  data: UnknownObject;
+  data: AnyObject;
   nativeEvent: Event;
 }
 
 // FIXME: Fix type compatibility.
 export interface ItemRemoveEvent<Props extends ItemProps> {
   // data: Props;
-  data: UnknownObject;
+  data: AnyObject;
 }
 
 /**
@@ -89,7 +95,7 @@ const parseLabelPosition = (
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function itemBasePropsDecoder(data: UnknownObject): ItemProps | never {
+export function itemBasePropsDecoder(data: AnyObject): ItemProps | never {
   if (data.id == null || isNaN(parseInt(data.id))) {
     throw new TypeError("invalid id.");
   }
@@ -118,6 +124,8 @@ export function itemBasePropsDecoder(data: UnknownObject): ItemProps | never {
 abstract class VisualConsoleItem<Props extends ItemProps> {
   // Properties of the item.
   private itemProps: Props;
+  // Metadata of the item.
+  private _metadata: ItemMeta;
   // Reference to the DOM element which will contain the item.
   public elementRef: HTMLElement;
   public readonly labelElementRef: HTMLElement;
@@ -138,8 +146,9 @@ abstract class VisualConsoleItem<Props extends ItemProps> {
    */
   protected abstract createDomElement(): HTMLElement;
 
-  public constructor(props: Props) {
+  public constructor(props: Props, metadata: ItemMeta) {
     this.itemProps = props;
+    this._metadata = metadata;
 
     /*
      * Get a HTMLElement which represents the container box
@@ -185,8 +194,10 @@ abstract class VisualConsoleItem<Props extends ItemProps> {
     box.style.zIndex = this.props.isOnTop ? "2" : "1";
     box.style.left = `${this.props.x}px`;
     box.style.top = `${this.props.y}px`;
-    box.onclick = e =>
-      this.clickEventManager.emit({ data: this.props, nativeEvent: e });
+    box.addEventListener("click", e => {
+      if (!this.meta.editMode)
+        this.clickEventManager.emit({ data: this.props, nativeEvent: e });
+    });
 
     return box;
   }
@@ -310,7 +321,34 @@ abstract class VisualConsoleItem<Props extends ItemProps> {
     // From this point, things which rely on this.props can access to the changes.
 
     // Check if we should re-render.
-    if (this.shouldBeUpdated(prevProps, newProps)) this.render(prevProps);
+    if (this.shouldBeUpdated(prevProps, newProps))
+      this.render(prevProps, this._metadata);
+  }
+
+  /**
+   * Public accessor of the `meta` property.
+   * @return Properties.
+   */
+  public get meta(): ItemMeta {
+    return { ...this._metadata }; // Return a copy.
+  }
+
+  /**
+   * Public setter of the `meta` property.
+   * If the new meta are different enough than the
+   * stored meta, a render would be fired.
+   * @param newProps
+   */
+  public set meta(newMetadata: ItemMeta) {
+    const prevMetadata = this._metadata;
+    // Update the internal meta.
+    this._metadata = newMetadata;
+
+    // From this point, things which rely on this.props can access to the changes.
+
+    // Check if we should re-render.
+    // if (this.shouldBeUpdated(prevMetadata, newMetadata))
+    this.render(this.itemProps, prevMetadata);
   }
 
   /**
@@ -333,7 +371,10 @@ abstract class VisualConsoleItem<Props extends ItemProps> {
    * To recreate or update the HTMLElement which represents the item into the DOM.
    * @param prevProps If exists it will be used to only perform DOM updates instead of a full replace.
    */
-  public render(prevProps: Props | null = null): void {
+  public render(
+    prevProps: Props | null = null,
+    prevMeta: ItemMeta | null = null
+  ): void {
     this.updateDomElement(this.childElementRef);
 
     // Move box.
@@ -378,6 +419,29 @@ abstract class VisualConsoleItem<Props extends ItemProps> {
       // Changed the reference to the main element. It's ugly, but needed.
       this.elementRef = container;
     }
+
+    // Change metadata related things.
+    if (!prevMeta || prevMeta.editMode !== this.meta.editMode) {
+      if (this.meta.editMode) {
+        this.elementRef.classList.add("is-editing");
+      } else {
+        this.elementRef.classList.remove("is-editing");
+      }
+    }
+    if (!prevMeta || prevMeta.isFetching !== this.meta.isFetching) {
+      if (this.meta.isFetching) {
+        this.elementRef.classList.add("is-fetching");
+      } else {
+        this.elementRef.classList.remove("is-fetching");
+      }
+    }
+    if (!prevMeta || prevMeta.isUpdating !== this.meta.isUpdating) {
+      if (this.meta.isUpdating) {
+        this.elementRef.classList.add("is-updating");
+      } else {
+        this.elementRef.classList.remove("is-updating");
+      }
+    }
   }
 
   /**
diff --git a/visual_console_client/src/VisualConsole.ts b/visual_console_client/src/VisualConsole.ts
index 7b45ccc2f1..59971fdff7 100644
--- a/visual_console_client/src/VisualConsole.ts
+++ b/visual_console_client/src/VisualConsole.ts
@@ -1,9 +1,10 @@
-import { UnknownObject, Size } from "./types";
+import { AnyObject, Size } from "./lib/types";
 import {
   parseBoolean,
   sizePropsDecoder,
   parseIntOr,
-  notEmptyStringOr
+  notEmptyStringOr,
+  itemMetaDecoder
 } from "./lib";
 import Item, {
   ItemType,
@@ -24,7 +25,7 @@ import EventsHistory, {
   eventsHistoryPropsDecoder
 } from "./items/EventsHistory";
 import Percentile, { percentilePropsDecoder } from "./items/Percentile";
-import TypedEvent, { Disposable, Listener } from "./TypedEvent";
+import TypedEvent, { Disposable, Listener } from "./lib/TypedEvent";
 import DonutGraph, { donutGraphPropsDecoder } from "./items/DonutGraph";
 import BarsGraph, { barsGraphPropsDecoder } from "./items/BarsGraph";
 import ModuleGraph, { moduleGraphPropsDecoder } from "./items/ModuleGraph";
@@ -32,47 +33,49 @@ import Service, { servicePropsDecoder } from "./items/Service";
 
 // TODO: Document.
 // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
-function itemInstanceFrom(data: UnknownObject) {
+function itemInstanceFrom(data: AnyObject) {
   const type = parseIntOr(data.type, null);
   if (type == null) throw new TypeError("missing item type.");
 
+  const meta = itemMetaDecoder(data);
+
   switch (type as ItemType) {
     case ItemType.STATIC_GRAPH:
-      return new StaticGraph(staticGraphPropsDecoder(data));
+      return new StaticGraph(staticGraphPropsDecoder(data), meta);
     case ItemType.MODULE_GRAPH:
-      return new ModuleGraph(moduleGraphPropsDecoder(data));
+      return new ModuleGraph(moduleGraphPropsDecoder(data), meta);
     case ItemType.SIMPLE_VALUE:
     case ItemType.SIMPLE_VALUE_MAX:
     case ItemType.SIMPLE_VALUE_MIN:
     case ItemType.SIMPLE_VALUE_AVG:
-      return new SimpleValue(simpleValuePropsDecoder(data));
+      return new SimpleValue(simpleValuePropsDecoder(data), meta);
     case ItemType.PERCENTILE_BAR:
     case ItemType.PERCENTILE_BUBBLE:
     case ItemType.CIRCULAR_PROGRESS_BAR:
     case ItemType.CIRCULAR_INTERIOR_PROGRESS_BAR:
-      return new Percentile(percentilePropsDecoder(data));
+      return new Percentile(percentilePropsDecoder(data), meta);
     case ItemType.LABEL:
-      return new Label(labelPropsDecoder(data));
+      return new Label(labelPropsDecoder(data), meta);
     case ItemType.ICON:
-      return new Icon(iconPropsDecoder(data));
+      return new Icon(iconPropsDecoder(data), meta);
     case ItemType.SERVICE:
-      return new Service(servicePropsDecoder(data));
+      return new Service(servicePropsDecoder(data), meta);
     case ItemType.GROUP_ITEM:
-      return new Group(groupPropsDecoder(data));
+      return new Group(groupPropsDecoder(data), meta);
     case ItemType.BOX_ITEM:
-      return new Box(boxPropsDecoder(data));
+      return new Box(boxPropsDecoder(data), meta);
     case ItemType.LINE_ITEM:
-      return new Line(linePropsDecoder(data));
+      return new Line(linePropsDecoder(data), meta);
     case ItemType.AUTO_SLA_GRAPH:
-      return new EventsHistory(eventsHistoryPropsDecoder(data));
+      return new EventsHistory(eventsHistoryPropsDecoder(data), meta);
     case ItemType.DONUT_GRAPH:
-      return new DonutGraph(donutGraphPropsDecoder(data));
+      return new DonutGraph(donutGraphPropsDecoder(data), meta);
     case ItemType.BARS_GRAPH:
-      return new BarsGraph(barsGraphPropsDecoder(data));
+      return new BarsGraph(barsGraphPropsDecoder(data), meta);
     case ItemType.CLOCK:
-      return new Clock(clockPropsDecoder(data));
+      return new Clock(clockPropsDecoder(data), meta);
     case ItemType.COLOR_CLOUD:
-      return new ColorCloud(colorCloudPropsDecoder(data));
+      return new ColorCloud(colorCloudPropsDecoder(data), meta);
     default:
       throw new TypeError("item not found");
   }
@@ -80,7 +83,7 @@ function itemInstanceFrom(data: UnknownObject) {
 
 // TODO: Document.
 // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
-function decodeProps(data: UnknownObject) {
+function decodeProps(data: AnyObject) {
   const type = parseIntOr(data.type, null);
   if (type == null) throw new TypeError("missing item type.");
 
@@ -147,7 +150,7 @@ export interface VisualConsoleProps extends Size {
  * is missing from the raw object or have an invalid type.
  */
 export function visualConsolePropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): VisualConsoleProps | never {
   // Object destructuring: http://es6-features.org/#ObjectMatchingShorthandNotation
   const {
@@ -226,8 +229,8 @@ export default class VisualConsole {
 
   public constructor(
     container: HTMLElement,
-    props: UnknownObject,
-    items: UnknownObject[]
+    props: AnyObject,
+    items: AnyObject[]
   ) {
     this.containerRef = container;
     this._props = visualConsolePropsDecoder(props);
@@ -288,13 +291,13 @@ export default class VisualConsole {
    * Public setter of the `elements` property.
    * @param items.
    */
-  public updateElements(items: UnknownObject[]): void {
-    const itemIds = items.map(item => item.id || null).filter(id => id != null);
-    itemIds as number[]; // Tell the type system to rely on us.
+  public updateElements(items: AnyObject[]): void {
+    // Ensure the type cause Typescript doesn't know the filter removes null items.
+    const itemIds = items
+      .map(item => item.id || null)
+      .filter(id => id != null) as number[];
     // Get the elements we should delete.
-    const deletedIds: number[] = this.elementIds.filter(
-      id => itemIds.indexOf(id) < 0
-    );
+    const deletedIds = this.elementIds.filter(id => itemIds.indexOf(id) < 0);
     // Delete the elements.
     deletedIds.forEach(id => {
       if (this.elementsById[id] != null) {
@@ -530,6 +533,9 @@ export default class VisualConsole {
         height: 0,
         lineWidth: this.props.relationLineWidth,
         color: "#CCCCCC"
+      }),
+      itemMetaDecoder({
+        receivedAt: new Date()
       })
     );
     // Save a reference to the line item.
diff --git a/visual_console_client/src/items/BarsGraph.ts b/visual_console_client/src/items/BarsGraph.ts
index d1a6fe97a5..7fcde89177 100644
--- a/visual_console_client/src/items/BarsGraph.ts
+++ b/visual_console_client/src/items/BarsGraph.ts
@@ -1,4 +1,4 @@
-import { UnknownObject, WithModuleProps } from "../types";
+import { AnyObject, WithModuleProps } from "../lib/types";
 import { modulePropsDecoder, decodeBase64, stringIsEmpty } from "../lib";
 import Item, { ItemType, ItemProps, itemBasePropsDecoder } from "../Item";
 
@@ -17,9 +17,7 @@ export type BarsGraphProps = {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function barsGraphPropsDecoder(
-  data: UnknownObject
-): BarsGraphProps | never {
+export function barsGraphPropsDecoder(data: AnyObject): BarsGraphProps | never {
   if (stringIsEmpty(data.html) && stringIsEmpty(data.encodedHtml)) {
     throw new TypeError("missing html content.");
   }
diff --git a/visual_console_client/src/items/Box.ts b/visual_console_client/src/items/Box.ts
index ca3078c0a6..042621c5a6 100644
--- a/visual_console_client/src/items/Box.ts
+++ b/visual_console_client/src/items/Box.ts
@@ -1,4 +1,4 @@
-import { UnknownObject } from "../types";
+import { AnyObject } from "../lib/types";
 import { parseIntOr, notEmptyStringOr } from "../lib";
 import Item, { ItemType, ItemProps, itemBasePropsDecoder } from "../Item";
 
@@ -24,7 +24,7 @@ interface BoxProps extends ItemProps {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function boxPropsDecoder(data: UnknownObject): BoxProps | never {
+export function boxPropsDecoder(data: AnyObject): BoxProps | never {
   return {
     ...itemBasePropsDecoder(data), // Object spread. It will merge the properties of the two objects.
     type: ItemType.BOX_ITEM,
diff --git a/visual_console_client/src/items/Clock/index.ts b/visual_console_client/src/items/Clock/index.ts
index 52e0e65775..e775c00102 100644
--- a/visual_console_client/src/items/Clock/index.ts
+++ b/visual_console_client/src/items/Clock/index.ts
@@ -1,6 +1,11 @@
 import "./styles.css";
 
-import { LinkedVisualConsoleProps, UnknownObject, Size } from "../../types";
+import {
+  LinkedVisualConsoleProps,
+  AnyObject,
+  Size,
+  ItemMeta
+} from "../../lib/types";
 import {
   linkedVCPropsDecoder,
   parseIntOr,
@@ -60,7 +65,7 @@ const parseClockFormat = (clockFormat: unknown): ClockProps["clockFormat"] => {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function clockPropsDecoder(data: UnknownObject): ClockProps | never {
+export function clockPropsDecoder(data: AnyObject): ClockProps | never {
   if (
     typeof data.clockTimezone !== "string" ||
     data.clockTimezone.length === 0
@@ -85,9 +90,9 @@ export default class Clock extends Item<ClockProps> {
   public static readonly TICK_INTERVAL = 1000; // In ms.
   private intervalRef: number | null = null;
 
-  public constructor(props: ClockProps) {
+  public constructor(props: ClockProps, meta: ItemMeta) {
     // Call the superclass constructor.
-    super(props);
+    super(props, meta);
 
     /* The item is already loaded and inserted into the DOM.
      * The class properties are now initialized.
diff --git a/visual_console_client/src/items/Clock/spec.ts b/visual_console_client/src/items/Clock/spec.ts
index 7380f98468..acd4233ed1 100644
--- a/visual_console_client/src/items/Clock/spec.ts
+++ b/visual_console_client/src/items/Clock/spec.ts
@@ -1,4 +1,5 @@
 import Clock, { clockPropsDecoder } from ".";
+import { itemMetaDecoder } from "../../lib";
 
 const genericRawProps = {
   id: 1,
@@ -46,6 +47,9 @@ describe("Clock item", () => {
       ...sizeRawProps,
       ...linkedModuleProps,
       ...digitalClockProps
+    }),
+    itemMetaDecoder({
+      receivedAt: new Date(1)
     })
   );
 
diff --git a/visual_console_client/src/items/ColorCloud.spec.ts b/visual_console_client/src/items/ColorCloud.spec.ts
index 103850b04b..fb873b8894 100644
--- a/visual_console_client/src/items/ColorCloud.spec.ts
+++ b/visual_console_client/src/items/ColorCloud.spec.ts
@@ -1,4 +1,5 @@
 import ColorCloud, { colorCloudPropsDecoder } from "./ColorCloud";
+import { itemMetaDecoder } from "../lib";
 
 const genericRawProps = {
   id: 1,
@@ -41,6 +42,9 @@ describe("Color cloud item", () => {
       ...sizeRawProps,
       ...linkedModuleProps,
       ...colorCloudProps
+    }),
+    itemMetaDecoder({
+      receivedAt: new Date(1)
     })
   );
 
diff --git a/visual_console_client/src/items/ColorCloud.ts b/visual_console_client/src/items/ColorCloud.ts
index 0b5dfe9948..ced87424d9 100644
--- a/visual_console_client/src/items/ColorCloud.ts
+++ b/visual_console_client/src/items/ColorCloud.ts
@@ -1,8 +1,8 @@
 import {
   WithModuleProps,
   LinkedVisualConsoleProps,
-  UnknownObject
-} from "../types";
+  AnyObject
+} from "../lib/types";
 import { modulePropsDecoder, linkedVCPropsDecoder } from "../lib";
 import Item, { itemBasePropsDecoder, ItemType, ItemProps } from "../Item";
 
@@ -24,7 +24,7 @@ export type ColorCloudProps = {
  * is missing from the raw object or have an invalid type.
  */
 export function colorCloudPropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): ColorCloudProps | never {
   // TODO: Validate the color.
   if (typeof data.color !== "string" || data.color.length === 0) {
diff --git a/visual_console_client/src/items/DonutGraph.ts b/visual_console_client/src/items/DonutGraph.ts
index d60f268567..c6436583c4 100644
--- a/visual_console_client/src/items/DonutGraph.ts
+++ b/visual_console_client/src/items/DonutGraph.ts
@@ -1,8 +1,8 @@
 import {
   LinkedVisualConsoleProps,
-  UnknownObject,
+  AnyObject,
   WithModuleProps
-} from "../types";
+} from "../lib/types";
 import {
   linkedVCPropsDecoder,
   modulePropsDecoder,
@@ -28,7 +28,7 @@ export type DonutGraphProps = {
  * is missing from the raw object or have an invalid type.
  */
 export function donutGraphPropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): DonutGraphProps | never {
   if (stringIsEmpty(data.html) && stringIsEmpty(data.encodedHtml)) {
     throw new TypeError("missing html content.");
diff --git a/visual_console_client/src/items/EventsHistory.ts b/visual_console_client/src/items/EventsHistory.ts
index 7e9db0ae9b..1d460e5b5b 100644
--- a/visual_console_client/src/items/EventsHistory.ts
+++ b/visual_console_client/src/items/EventsHistory.ts
@@ -1,4 +1,4 @@
-import { UnknownObject, WithModuleProps } from "../types";
+import { AnyObject, WithModuleProps } from "../lib/types";
 import {
   modulePropsDecoder,
   parseIntOr,
@@ -24,7 +24,7 @@ export type EventsHistoryProps = {
  * is missing from the raw object or have an invalid type.
  */
 export function eventsHistoryPropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): EventsHistoryProps | never {
   if (stringIsEmpty(data.html) && stringIsEmpty(data.encodedHtml)) {
     throw new TypeError("missing html content.");
diff --git a/visual_console_client/src/items/Group.spec.ts b/visual_console_client/src/items/Group.spec.ts
index e00a5cf327..c117a95b42 100644
--- a/visual_console_client/src/items/Group.spec.ts
+++ b/visual_console_client/src/items/Group.spec.ts
@@ -1,4 +1,5 @@
 import Group, { groupPropsDecoder } from "./Group";
+import { itemMetaDecoder } from "../lib";
 
 const genericRawProps = {
   id: 1,
@@ -33,6 +34,9 @@ describe("Group item", () => {
       ...positionRawProps,
       ...sizeRawProps,
       ...groupRawProps
+    }),
+    itemMetaDecoder({
+      receivedAt: new Date(1)
     })
   );
 
diff --git a/visual_console_client/src/items/Group.ts b/visual_console_client/src/items/Group.ts
index fa97f69a62..98552a0f1b 100644
--- a/visual_console_client/src/items/Group.ts
+++ b/visual_console_client/src/items/Group.ts
@@ -1,4 +1,4 @@
-import { LinkedVisualConsoleProps, UnknownObject } from "../types";
+import { LinkedVisualConsoleProps, AnyObject } from "../lib/types";
 import {
   linkedVCPropsDecoder,
   parseIntOr,
@@ -19,7 +19,7 @@ export type GroupProps = {
 } & ItemProps &
   LinkedVisualConsoleProps;
 
-function extractHtml(data: UnknownObject): string | null {
+function extractHtml(data: AnyObject): string | null {
   if (!stringIsEmpty(data.html)) return data.html;
   if (!stringIsEmpty(data.encodedHtml)) return decodeBase64(data.encodedHtml);
   return null;
@@ -34,7 +34,7 @@ function extractHtml(data: UnknownObject): string | null {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function groupPropsDecoder(data: UnknownObject): GroupProps | never {
+export function groupPropsDecoder(data: AnyObject): GroupProps | never {
   if (
     (typeof data.imageSrc !== "string" || data.imageSrc.length === 0) &&
     data.encodedHtml === null
diff --git a/visual_console_client/src/items/Icon.ts b/visual_console_client/src/items/Icon.ts
index 12c1b035c7..d6e4a21fc6 100644
--- a/visual_console_client/src/items/Icon.ts
+++ b/visual_console_client/src/items/Icon.ts
@@ -1,4 +1,4 @@
-import { LinkedVisualConsoleProps, UnknownObject } from "../types";
+import { LinkedVisualConsoleProps, AnyObject } from "../lib/types";
 import { linkedVCPropsDecoder } from "../lib";
 import Item, { ItemType, ItemProps, itemBasePropsDecoder } from "../Item";
 
@@ -17,7 +17,7 @@ export type IconProps = {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function iconPropsDecoder(data: UnknownObject): IconProps | never {
+export function iconPropsDecoder(data: AnyObject): IconProps | never {
   if (typeof data.imageSrc !== "string" || data.imageSrc.length === 0) {
     throw new TypeError("invalid image src.");
   }
diff --git a/visual_console_client/src/items/Label.ts b/visual_console_client/src/items/Label.ts
index c8de572c15..4f6a382a08 100644
--- a/visual_console_client/src/items/Label.ts
+++ b/visual_console_client/src/items/Label.ts
@@ -1,4 +1,4 @@
-import { LinkedVisualConsoleProps, UnknownObject } from "../types";
+import { LinkedVisualConsoleProps, AnyObject } from "../lib/types";
 import { linkedVCPropsDecoder } from "../lib";
 import Item, { ItemType, ItemProps, itemBasePropsDecoder } from "../Item";
 
@@ -16,7 +16,7 @@ export type LabelProps = {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function labelPropsDecoder(data: UnknownObject): LabelProps | never {
+export function labelPropsDecoder(data: AnyObject): LabelProps | never {
   return {
     ...itemBasePropsDecoder(data), // Object spread. It will merge the properties of the two objects.
     type: ItemType.LABEL,
diff --git a/visual_console_client/src/items/Line.ts b/visual_console_client/src/items/Line.ts
index 20532e44ea..8735279a9b 100644
--- a/visual_console_client/src/items/Line.ts
+++ b/visual_console_client/src/items/Line.ts
@@ -1,4 +1,4 @@
-import { UnknownObject, Position, Size } from "../types";
+import { AnyObject, Position, Size, ItemMeta } from "../lib/types";
 import { parseIntOr, notEmptyStringOr } from "../lib";
 import Item, { ItemType, ItemProps, itemBasePropsDecoder } from "../Item";
 
@@ -25,7 +25,7 @@ interface LineProps extends ItemProps {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function linePropsDecoder(data: UnknownObject): LineProps | never {
+export function linePropsDecoder(data: AnyObject): LineProps | never {
   const props: LineProps = {
     ...itemBasePropsDecoder({ ...data, width: 1, height: 1 }), // Object spread. It will merge the properties of the two objects.
     type: ItemType.LINE_ITEM,
@@ -71,17 +71,20 @@ export default class Line extends Item<LineProps> {
   /**
    * @override
    */
-  public constructor(props: LineProps) {
+  public constructor(props: LineProps, meta: ItemMeta) {
     /*
      * We need to override the constructor cause we need to obtain
      * the
      * box size and position from the start and finish points
      * of the line.
      */
-    super({
-      ...props,
-      ...Line.extractBoxSizeAndPosition(props)
-    });
+    super(
+      {
+        ...props,
+        ...Line.extractBoxSizeAndPosition(props)
+      },
+      meta
+    );
   }
 
   /**
diff --git a/visual_console_client/src/items/ModuleGraph.ts b/visual_console_client/src/items/ModuleGraph.ts
index 3440496d19..ce23785d36 100644
--- a/visual_console_client/src/items/ModuleGraph.ts
+++ b/visual_console_client/src/items/ModuleGraph.ts
@@ -1,8 +1,8 @@
 import {
   LinkedVisualConsoleProps,
-  UnknownObject,
+  AnyObject,
   WithModuleProps
-} from "../types";
+} from "../lib/types";
 import {
   linkedVCPropsDecoder,
   modulePropsDecoder,
@@ -28,7 +28,7 @@ export type ModuleGraphProps = {
  * is missing from the raw object or have an invalid type.
  */
 export function moduleGraphPropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): ModuleGraphProps | never {
   if (stringIsEmpty(data.html) && stringIsEmpty(data.encodedHtml)) {
     throw new TypeError("missing html content.");
diff --git a/visual_console_client/src/items/Percentile.ts b/visual_console_client/src/items/Percentile.ts
index 4c93b86b1f..0706f55ed9 100644
--- a/visual_console_client/src/items/Percentile.ts
+++ b/visual_console_client/src/items/Percentile.ts
@@ -2,9 +2,9 @@ import { arc as arcFactory } from "d3-shape";
 
 import {
   LinkedVisualConsoleProps,
-  UnknownObject,
+  AnyObject,
   WithModuleProps
-} from "../types";
+} from "../lib/types";
 import {
   linkedVCPropsDecoder,
   modulePropsDecoder,
@@ -81,7 +81,7 @@ function extractValueType(valueType: unknown): PercentileProps["valueType"] {
  * is missing from the raw object or have an invalid type.
  */
 export function percentilePropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): PercentileProps | never {
   return {
     ...itemBasePropsDecoder(data), // Object spread. It will merge the properties of the two objects.
diff --git a/visual_console_client/src/items/Service.ts b/visual_console_client/src/items/Service.ts
index 9440503e80..09a8c26824 100644
--- a/visual_console_client/src/items/Service.ts
+++ b/visual_console_client/src/items/Service.ts
@@ -1,4 +1,4 @@
-import { UnknownObject } from "../types";
+import { AnyObject } from "../lib/types";
 import {
   stringIsEmpty,
   notEmptyStringOr,
@@ -24,7 +24,7 @@ export type ServiceProps = {
  * @throws Will throw a TypeError if some property
  * is missing from the raw object or have an invalid type.
  */
-export function servicePropsDecoder(data: UnknownObject): ServiceProps | never {
+export function servicePropsDecoder(data: AnyObject): ServiceProps | never {
   if (data.imageSrc !== null) {
     if (
       typeof data.statusImageSrc !== "string" ||
diff --git a/visual_console_client/src/items/SimpleValue.ts b/visual_console_client/src/items/SimpleValue.ts
index 7cc5e139af..10b8e4097a 100644
--- a/visual_console_client/src/items/SimpleValue.ts
+++ b/visual_console_client/src/items/SimpleValue.ts
@@ -1,8 +1,8 @@
 import {
   LinkedVisualConsoleProps,
-  UnknownObject,
+  AnyObject,
   WithModuleProps
-} from "../types";
+} from "../lib/types";
 import {
   linkedVCPropsDecoder,
   parseIntOr,
@@ -69,7 +69,7 @@ const parseProcessValue = (
  * is missing from the raw object or have an invalid type.
  */
 export function simpleValuePropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): SimpleValueProps | never {
   if (typeof data.value !== "string" || data.value.length === 0) {
     throw new TypeError("invalid value");
diff --git a/visual_console_client/src/items/StaticGraph.ts b/visual_console_client/src/items/StaticGraph.ts
index 899d54ec70..39267e33f9 100644
--- a/visual_console_client/src/items/StaticGraph.ts
+++ b/visual_console_client/src/items/StaticGraph.ts
@@ -1,8 +1,8 @@
 import {
   WithModuleProps,
   LinkedVisualConsoleProps,
-  UnknownObject
-} from "../types";
+  AnyObject
+} from "../lib/types";
 
 import {
   modulePropsDecoder,
@@ -47,7 +47,7 @@ const parseShowLastValueTooltip = (
  * is missing from the raw object or have an invalid type.
  */
 export function staticGraphPropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): StaticGraphProps | never {
   if (typeof data.imageSrc !== "string" || data.imageSrc.length === 0) {
     throw new TypeError("invalid image src.");
diff --git a/visual_console_client/src/lib/AsyncTaskManager.ts b/visual_console_client/src/lib/AsyncTaskManager.ts
index 5ad261194b..ef187f45ad 100644
--- a/visual_console_client/src/lib/AsyncTaskManager.ts
+++ b/visual_console_client/src/lib/AsyncTaskManager.ts
@@ -1,4 +1,4 @@
-import TypedEvent, { Disposable, Listener } from "../TypedEvent";
+import TypedEvent, { Disposable, Listener } from "./TypedEvent";
 
 interface Cancellable {
   cancel(): void;
diff --git a/visual_console_client/src/TypedEvent.ts b/visual_console_client/src/lib/TypedEvent.ts
similarity index 100%
rename from visual_console_client/src/TypedEvent.ts
rename to visual_console_client/src/lib/TypedEvent.ts
diff --git a/visual_console_client/src/lib/index.ts b/visual_console_client/src/lib/index.ts
index 1a04ca74af..65f0a1ab86 100644
--- a/visual_console_client/src/lib/index.ts
+++ b/visual_console_client/src/lib/index.ts
@@ -1,12 +1,14 @@
 import {
-  UnknownObject,
+  AnyObject,
   Position,
   Size,
   WithAgentProps,
   WithModuleProps,
   LinkedVisualConsoleProps,
-  LinkedVisualConsolePropsStatus
-} from "../types";
+  LinkedVisualConsolePropsStatus,
+  UnknownObject,
+  ItemMeta
+} from "./types";
 
 /**
  * Return a number or a default value from a raw value.
@@ -72,6 +74,23 @@ export function parseBoolean(value: unknown): boolean {
   else return false;
 }
 
+/**
+ * Return a valid date or a default value from a raw value.
+ * @param value Raw value from which we will try to extract a valid date.
+ * @param defaultValue Default value to use if we cannot extract a valid date.
+ * @return A valid date or the default value.
+ */
+export function parseDateOr<T>(value: unknown, defaultValue: T): Date | T {
+  if (value instanceof Date) return value;
+  else if (typeof value === "number") return new Date(value * 1000);
+  else if (
+    typeof value === "string" &&
+    !Number.isNaN(new Date(value).getTime())
+  )
+    return new Date(value);
+  else return defaultValue;
+}
+
 /**
  * Pad the current string with another string (multiple times, if needed)
  * until the resulting string reaches the given length.
@@ -113,7 +132,7 @@ export function leftPad(
  * @param data Raw object.
  * @return An object representing the position.
  */
-export function positionPropsDecoder(data: UnknownObject): Position {
+export function positionPropsDecoder(data: AnyObject): Position {
   return {
     x: parseIntOr(data.x, 0),
     y: parseIntOr(data.y, 0)
@@ -126,7 +145,7 @@ export function positionPropsDecoder(data: UnknownObject): Position {
  * @return An object representing the size.
  * @throws Will throw a TypeError if the width and height are not valid numbers.
  */
-export function sizePropsDecoder(data: UnknownObject): Size | never {
+export function sizePropsDecoder(data: AnyObject): Size | never {
   if (
     data.width == null ||
     isNaN(parseInt(data.width)) ||
@@ -147,7 +166,7 @@ export function sizePropsDecoder(data: UnknownObject): Size | never {
  * @param data Raw object.
  * @return An object representing the agent properties.
  */
-export function agentPropsDecoder(data: UnknownObject): WithAgentProps {
+export function agentPropsDecoder(data: AnyObject): WithAgentProps {
   const agentProps: WithAgentProps = {
     agentId: parseIntOr(data.agent, null),
     agentName: notEmptyStringOr(data.agentName, null),
@@ -169,7 +188,7 @@ export function agentPropsDecoder(data: UnknownObject): WithAgentProps {
  * @param data Raw object.
  * @return An object representing the module and agent properties.
  */
-export function modulePropsDecoder(data: UnknownObject): WithModuleProps {
+export function modulePropsDecoder(data: AnyObject): WithModuleProps {
   return {
     moduleId: parseIntOr(data.moduleId, null),
     moduleName: notEmptyStringOr(data.moduleName, null),
@@ -185,7 +204,7 @@ export function modulePropsDecoder(data: UnknownObject): WithModuleProps {
  * @throws Will throw a TypeError if the status calculation properties are invalid.
  */
 export function linkedVCPropsDecoder(
-  data: UnknownObject
+  data: AnyObject
 ): LinkedVisualConsoleProps | never {
   // Object destructuring: http://es6-features.org/#ObjectMatchingShorthandNotation
   const {
@@ -246,6 +265,29 @@ export function linkedVCPropsDecoder(
     : linkedLayoutBaseProps;
 }
 
+/**
+ * Build a valid typed object from a raw object.
+ * @param data Raw object.
+ * @return An object representing the item's meta properties.
+ */
+export function itemMetaDecoder(data: UnknownObject): ItemMeta | never {
+  const receivedAt = parseDateOr(data.receivedAt, null);
+  if (receivedAt === null) throw new TypeError("invalid meta structure");
+
+  let error = null;
+  if (data.error instanceof Error) error = data.error;
+  else if (typeof data.error === "string") error = new Error(data.error);
+
+  return {
+    receivedAt,
+    error,
+    editMode: parseBoolean(data.editMode),
+    isFromCache: parseBoolean(data.isFromCache),
+    isFetching: false,
+    isUpdating: false
+  };
+}
+
 /**
  * To get a CSS rule with the most used prefixes.
  * @param ruleName Name of the CSS rule.
diff --git a/visual_console_client/src/lib/spec.ts b/visual_console_client/src/lib/spec.ts
index ca86e2f499..ae8ffb02cc 100644
--- a/visual_console_client/src/lib/spec.ts
+++ b/visual_console_client/src/lib/spec.ts
@@ -7,7 +7,8 @@ import {
   decodeBase64,
   humanDate,
   humanTime,
-  replaceMacros
+  replaceMacros,
+  itemMetaDecoder
 } from ".";
 
 describe("function parseIntOr", () => {
@@ -72,14 +73,14 @@ describe("function prefixedCssRules", () => {
 
 describe("function decodeBase64", () => {
   it("should decode the base64 without errors", () => {
-    expect(decodeBase64("SGkgSSdtIGRlY29kZWQ=")).toEqual("Hi I'm decoded");
-    expect(decodeBase64("Rk9PQkFSQkFa")).toEqual("FOOBARBAZ");
-    expect(decodeBase64("eyJpZCI6MSwibmFtZSI6ImZvbyJ9")).toEqual(
+    expect(decodeBase64("SGkgSSdtIGRlY29kZWQ=")).toBe("Hi I'm decoded");
+    expect(decodeBase64("Rk9PQkFSQkFa")).toBe("FOOBARBAZ");
+    expect(decodeBase64("eyJpZCI6MSwibmFtZSI6ImZvbyJ9")).toBe(
       '{"id":1,"name":"foo"}'
     );
     expect(
       decodeBase64("PGRpdj5Cb3ggPHA+UGFyYWdyYXBoPC9wPjxociAvPjwvZGl2Pg==")
-    ).toEqual("<div>Box <p>Paragraph</p><hr /></div>");
+    ).toBe("<div>Box <p>Paragraph</p><hr /></div>");
   });
 });
 
@@ -118,3 +119,46 @@ describe("replaceMacros function", () => {
     expect(replaceMacros(macros, text)).toBe("Lorem foo Ipsum baz");
   });
 });
+
+describe("itemMetaDecoder function", () => {
+  it("should extract a default meta object", () => {
+    expect(
+      itemMetaDecoder({
+        receivedAt: 1
+      })
+    ).toEqual({
+      receivedAt: new Date(1000),
+      error: null,
+      isFromCache: false,
+      isFetching: false,
+      isUpdating: false,
+      editMode: false
+    });
+  });
+
+  it("should extract a valid meta object", () => {
+    expect(
+      itemMetaDecoder({
+        receivedAt: new Date(1000),
+        error: new Error("foo"),
+        editMode: 1
+      })
+    ).toEqual({
+      receivedAt: new Date(1000),
+      error: new Error("foo"),
+      isFromCache: false,
+      isFetching: false,
+      isUpdating: false,
+      editMode: true
+    });
+  });
+
+  it("should fail when a invalid structure is used", () => {
+    expect(() => itemMetaDecoder({})).toThrowError(TypeError);
+    expect(() =>
+      itemMetaDecoder({
+        receivedAt: "foo"
+      })
+    ).toThrowError(TypeError);
+  });
+});
diff --git a/visual_console_client/src/types.ts b/visual_console_client/src/lib/types.ts
similarity index 83%
rename from visual_console_client/src/types.ts
rename to visual_console_client/src/lib/types.ts
index 79dee56e74..97f6cb622d 100644
--- a/visual_console_client/src/types.ts
+++ b/visual_console_client/src/lib/types.ts
@@ -1,7 +1,11 @@
-export interface UnknownObject {
+export interface AnyObject {
   [key: string]: any; // eslint-disable-line @typescript-eslint/no-explicit-any
 }
 
+export interface UnknownObject {
+  [key: string]: unknown;
+}
+
 export interface Position {
   x: number;
   y: number;
@@ -45,3 +49,12 @@ export type LinkedVisualConsoleProps = {
   linkedLayoutId: number | null;
   linkedLayoutAgentId: number | null;
 } & LinkedVisualConsolePropsStatus;
+
+export interface ItemMeta {
+  receivedAt: Date;
+  error: Error | null;
+  isFromCache: boolean;
+  isFetching: boolean;
+  isUpdating: boolean;
+  editMode: boolean;
+}