Workflow: Manual Mongodb Automate

{
    "nodes": [
        {
            "name": "On clicking 'execute'",
            "type": "n8n-nodes-base.manualTrigger",
            "position": [
                220,
                320
            ],
            "parameters": [],
            "typeVersion": 1
        },
        {
            "name": "Set",
            "type": "n8n-nodes-base.set",
            "position": [
                420,
                320
            ],
            "parameters": {
                "values": {
                    "string": [
                        {
                            "name": "my_key",
                            "value": "my_value"
                        }
                    ]
                },
                "options": []
            },
            "typeVersion": 1
        },
        {
            "name": "MongoDB",
            "type": "n8n-nodes-base.mongoDb",
            "position": [
                620,
                320
            ],
            "parameters": {
                "fields": "my_key",
                "operation": "insert",
                "collection": "n8n-collection"
            },
            "credentials": {
                "mongoDb": "mongodb_credentials"
            },
            "typeVersion": 1
        }
    ],
    "connections": {
        "Set": {
            "main": [
                [
                    {
                        "node": "MongoDB",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "On clicking 'execute'": {
            "main": [
                [
                    {
                        "node": "Set",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    }
}