obj_field

{
    "name": "string",
    "alias": "string",
    "type": "string",
    "isTitle": true,
    "required": true,
    "isHidden": true,
    "isReadOnly": true,
    "isHiddenOnCreate": true,
    "isUnique": true,
    "precision": 0,
    "subType": "string",
    "options": {
        "value": "string",
        "index": 0
    },
    "showFields": [
        "string"
    ],
    "max": 0,
    "dataSource": "string",
    "sourceControlId": "string"
}