{
  "id": {
    "is_mandatory_field": true,
    "type": "number"
  },
  "name": {
    "is_mandatory_field": true,
    "type": "string"
  },
  "contacts": {
    "is_mandatory_field": false,
    "type": "JSONArray",
    "json_dtype": "user_contacts.json"
  }
}