Interface UserMessage

interface UserMessage {
    font: number;
    message: MessageSegment[];
    message_id: number;
    message_seq?: number;
    message_type: "private";
    post_type: "message" | "message_sent";
    raw_message: string;
    self_id: number;
    sender: Sender;
    sub_type: "group" | "friend";
    target_id: number;
    temp_source?: number;
    time: number;
    user_id: number;
}