{
  "schema": {
    "bsonType": "object",
    "required": ["value", "expired"],
    "permission": {
      "read": false,
      "create": false,
      "update": false,
      "delete": false
    },
    "properties": {
      "_id": {
        "description": "ID，系统自动生成"
      },
      "value": {
        "description": "值"
      },
      "expired": {
        "description": "过期时间"
      }
    }
  },
  "index": []
}