FieldDropdownNode

{
    "id": 0,
    "fieldName": "string",
    "type": 0,
    "disable": 0,
    "input": 0,
    "children": [
        {
            "id": 0,
            "fieldName": "string",
            "type": 0,
            "disable": 0,
            "input": 0,
            "children": []
        }
    ]
}