diff --git a/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-base.ts b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-base.ts
new file mode 100644
index 0000000000..42dee34374
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-base.ts
@@ -0,0 +1,24 @@
+import { UmbData } from '../data.js';
+
+export abstract class UmbEntityMockDbBase<MockItemType extends { id: string }> extends UmbData<MockItemType> {
+	constructor(data: Array<MockItemType>) {
+		super(data);
+	}
+
+	create(item: MockItemType) {
+		this.data.push(item);
+	}
+
+	read(id: string) {
+		return this.data.find((item) => item.id === id);
+	}
+
+	update(id: string, updatedItem: MockItemType) {
+		const itemIndex = this.data.findIndex((item) => item.id === id);
+		this.data[itemIndex] = updatedItem;
+	}
+
+	delete(id: string) {
+		this.data = this.data.filter((item) => item.id !== id);
+	}
+}
diff --git a/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-detail.manager.ts b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-detail.manager.ts
new file mode 100644
index 0000000000..9bcca3d802
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-detail.manager.ts
@@ -0,0 +1,46 @@
+import { UmbEntityMockDbBase } from './entity-base.js';
+
+export class UmbMockEntityDetailManager<MockType extends { id: string }> {
+	#db: UmbEntityMockDbBase<MockType>;
+	#createMockItemMapper: (request: any) => MockType;
+	#readResponseMapper: (mockItem: MockType) => any;
+
+	constructor(
+		db: UmbEntityMockDbBase<MockType>,
+		createMockItemMapper: (request: any) => MockType,
+		readResponseMapper: (mockItem: MockType) => any,
+	) {
+		this.#db = db;
+		this.#createMockItemMapper = createMockItemMapper;
+		this.#readResponseMapper = readResponseMapper;
+	}
+
+	create(request: any) {
+		const mockItem = this.#createMockItemMapper(request);
+		// create mock item in mock db
+		this.#db.create(mockItem);
+		return mockItem.id;
+	}
+
+	read(id: string) {
+		const item = this.#db.read(id);
+		if (!item) throw new Error('Item not found');
+		const mappedItem = this.#readResponseMapper(item);
+		return mappedItem;
+	}
+
+	update(id: string, item: any) {
+		const mockItem = this.#db.read(id);
+
+		const updatedMockItem = {
+			...mockItem,
+			...item,
+		} as unknown as MockType;
+
+		this.#db.update(id, updatedMockItem);
+	}
+
+	delete(path: string) {
+		this.#db.delete(path);
+	}
+}
diff --git a/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-folder.manager.ts b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-folder.manager.ts
new file mode 100644
index 0000000000..dd11be95a2
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-folder.manager.ts
@@ -0,0 +1,61 @@
+import { UmbEntityMockDbBase } from './entity-base.js';
+import {
+	CreateFolderRequestModel,
+	FolderResponseModel,
+	FolderTreeItemResponseModel,
+	UpdateFolderResponseModel,
+} from '@umbraco-cms/backoffice/backend-api';
+
+export class UmbMockEntityFolderManager<MockItemType extends Omit<FolderTreeItemResponseModel, 'type'>> {
+	#db: UmbEntityMockDbBase<MockItemType>;
+	#createMockFolderMapper: (request: CreateFolderRequestModel) => MockItemType;
+
+	constructor(
+		db: UmbEntityMockDbBase<MockItemType>,
+		createMockFolderMapper: (request: CreateFolderRequestModel) => MockItemType,
+	) {
+		this.#db = db;
+		this.#createMockFolderMapper = createMockFolderMapper;
+	}
+
+	create(request: CreateFolderRequestModel) {
+		const newFolder = this.#createMockFolderMapper(request);
+		this.#db.create(newFolder);
+		return newFolder.id;
+	}
+
+	read(id: string) {
+		const mockItem = this.#db.read(id);
+		if (mockItem?.isFolder) {
+			return this.#defaultReadMapper(mockItem);
+		} else {
+			return undefined;
+		}
+	}
+
+	update(id: string, request: UpdateFolderResponseModel) {
+		const mockItem = this.#db.read(id);
+
+		const updatedMockItem = {
+			...mockItem,
+			name: request.name,
+		} as unknown as MockItemType;
+
+		this.#db.update(id, updatedMockItem);
+	}
+
+	delete(id: string) {
+		const dbItem = this.#db.read(id);
+		if (dbItem?.isFolder) {
+			this.#db.delete(id);
+		}
+	}
+
+	#defaultReadMapper = (item: MockItemType): FolderResponseModel => {
+		return {
+			name: item.name,
+			id: item.id,
+			parentId: item.parentId,
+		};
+	};
+}
diff --git a/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-item.manager.ts b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-item.manager.ts
new file mode 100644
index 0000000000..7d3219e7b5
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-item.manager.ts
@@ -0,0 +1,16 @@
+import { UmbData } from '../data.js';
+
+export class UmbMockEntityItemManager<T extends { id: string }> {
+	#db: UmbData<T>;
+	#itemReadMapper: (item: T) => any;
+
+	constructor(db: UmbData<T>, itemReadMapper: (item: T) => any) {
+		this.#db = db;
+		this.#itemReadMapper = itemReadMapper;
+	}
+
+	getItems(ids: Array<string>) {
+		const items = this.#db.getData().filter((item) => ids.includes(item.id));
+		return items.map((item) => this.#itemReadMapper(item));
+	}
+}
diff --git a/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-tree.manager.ts b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-tree.manager.ts
new file mode 100644
index 0000000000..724d3e62ce
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/mocks/data/entity/entity-tree.manager.ts
@@ -0,0 +1,82 @@
+import { UmbId } from '@umbraco-cms/backoffice/id';
+import { UmbEntityMockDbBase } from './entity-base.js';
+import { EntityTreeItemResponseModel } from '@umbraco-cms/backoffice/backend-api';
+
+export class UmbMockEntityTreeManager<T extends Omit<EntityTreeItemResponseModel, 'type'>> {
+	#db: UmbEntityMockDbBase<T>;
+	#treeItemMapper: (item: T) => any;
+
+	constructor(mockDb: UmbEntityMockDbBase<T>, treeItemMapper: (item: T) => any) {
+		this.#db = mockDb;
+		this.#treeItemMapper = treeItemMapper;
+	}
+
+	getRoot() {
+		const items = this.#db.getData().filter((item) => item.parentId === null);
+		const treeItems = items.map((item) => this.#treeItemMapper(item));
+		const total = items.length;
+		return { items: treeItems, total };
+	}
+
+	getChildrenOf(parentId: string) {
+		const items = this.#db.getData().filter((item) => item.parentId === parentId);
+		const treeItems = items.map((item) => this.#treeItemMapper(item));
+		const total = items.length;
+		return { items: treeItems, total };
+	}
+
+	move(ids: Array<string>, destinationId: string) {
+		const destinationItem = this.#db.read(destinationId);
+		if (!destinationItem) throw new Error(`Destination item with id ${destinationId} not found`);
+
+		const items: Array<any> = [];
+
+		ids.forEach((id) => {
+			const item = this.#db.read(id);
+			if (!item) throw new Error(`Item with id ${id} not found`);
+			items.push(item);
+		});
+
+		const movedItems = items.map((item) => {
+			return {
+				...item,
+				parentId: destinationId,
+			};
+		});
+
+		movedItems.forEach((movedItem: any) => this.#db.update(movedItem.id, movedItem));
+		destinationItem.hasChildren = true;
+		this.#db.update(destinationItem.id, destinationItem);
+	}
+
+	copy(ids: Array<string>, destinationId: string) {
+		const destinationItem = this.#db.read(destinationId);
+		if (!destinationItem) throw new Error(`Destination item with id ${destinationId} not found`);
+
+		// TODO: Notice we don't add numbers to the 'copy' name.
+		const items: Array<any> = [];
+
+		ids.forEach((id) => {
+			const item = this.#db.read(id);
+			if (!item) throw new Error(`Item with id ${id} not found`);
+			items.push(item);
+		});
+
+		const copyItems = items.map((item) => {
+			return {
+				...item,
+				name: item.name + ' Copy',
+				id: UmbId.new(),
+				parentId: destinationId,
+			};
+		});
+
+		copyItems.forEach((copyItem) => this.#db.create(copyItem));
+		const newIds = copyItems.map((item) => item.id);
+
+		destinationItem.hasChildren = true;
+		this.#db.update(destinationItem.id, destinationItem);
+
+		return newIds;
+	}
+}