如何设置JSON文件中的下拉值

{
  "name": "John",
  "age": 25,
  "gender": "male",
  "country": "China",
  "language": "English",
  "preferences": {
    "theme": "dark",
    "notifications": "enabled",
    "language": {
      "displayName": "Language",
      "type": "dropdown",
      "enum": [
        {
          "displayText": "English",
          "value": "en"
        },
        {
          "displayText": "Chinese",
          "value": "zh"
        },
        {
          "displayText": "Spanish",
          "value": "es"
        }
      ],
      "default": "en"
    }
  }
}