Workflow:

{
    "nodes": [
        {
            "name": "Mock Data",
            "type": "n8n-nodes-base.function",
            "position": [
                670,
                371
            ],
            "parameters": {
                "functionCode": "return [\n  {\n    json:[\n      {\n        id: 1,\n        name: \"Jim\"\n      }, \n      {\n        id: 2,\n        name: \"Stefan\"\n      },\n      {\n        id: 3,\n        name: \"Hans\"\n      }\n    ]\n  }\n];"
            },
            "typeVersion": 1
        },
        {
            "name": "Create JSON-items",
            "type": "n8n-nodes-base.function",
            "position": [
                910,
                371
            ],
            "parameters": {
                "functionCode": "return items[0].json.map(item => { \n  return {\n    json: item,\n  }\n})\n"
            },
            "typeVersion": 1
        }
    ],
    "connections": {
        "Mock Data": {
            "main": [
                [
                    {
                        "node": "Create JSON-items",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    }
}