{
  "$jsonSchema": {
    "bsonType": "object",
    "required": ["app_id", "user_name", "text", "score", "timestamp"],
    "properties": {
      "app_id": {
        "bsonType": "string",
        "minLength": 3,
        "maxLength": 5
      },
      "user_name": {
        "bsonType": "string",
        "minLength": 3,
        "maxLength": 16
      },
      "score": {
        "bsonType": "number",
        "minimum": 1,
        "maximum": 10
      },
      "text": {
        "bsonType": "string",
        "minLength": 2,
        "maxLength": 2000
      },
      "timestamp": {
        "bsonType": "number",
        "minimum": 1658995612
      }
    }
  }
}