MessageEvent(消息)

{
    "time": 1640995200,
    "self_id": 123456789,
    "post_type": "message",
    "message_id": 0,
    "message_seq": 0,
    "real_id": 0,
    "user_id": 0,
    "group_id": 0,
    "message_type": "private",
    "sub_type": "friend",
    "sender": {
        "user_id": 0,
        "nickname": "string",
        "card": "string",
        "sex": "male",
        "age": 0,
        "level": "string",
        "role": "owner",
        "title": "string",
        "group_id": 0
    },
    "message": "string",
    "message_format": "array",
    "raw_message": "string",
    "font": 14,
    "target_id": 0,
    "temp_source": 0
}