GroupNotification(群通知实体)

{
    "type": "join_request",
    "group_id": -9007199254740991,
    "notification_seq": -9007199254740991,
    "is_filtered": true,
    "initiator_id": -9007199254740991,
    "state": "pending",
    "operator_id": -9007199254740991,
    "comment": "string"
}