URL    = "https://b24-ar17wx.bitrix24.by/rest/1/h0m...";
    ChatID = "2936";

    OPI_TypeConversion.GetLine(ChatID);

    ChatString = "chat" + ChatID;

    Result = OPI_Bitrix24.SendWritingNotification(URL, ChatString);

    URL    = "b24-ar17wx.bitrix24.by";
    Token  = "9c04a368006e9f06006b12e400000001000...";
    UserID = 10;

    Result = OPI_Bitrix24.SendWritingNotification(URL, UserID, Token);