URL = "https://b24-ar17wx.bitrix24.by/rest/1/1o2...";

    Type = "date";
    Name = "BIRTHDAY_FIELD";

    Result = OPI_Bitrix24.AddCustomTaskField(URL, Type, Name);

    URL   = "b24-ar17wx.bitrix24.by";
    Token = "6476c766006e9f06006b12e400000001000...";

    Type       = "string";
    Name       = "TEXT_FIELD";
    ExternalID = "BITRIX_TEXT_FIELD";
    Title      = "Text field";
    Signature  = New Structure("en,ru", "Some field", "Nekotoroe pole");

    Result = OPI_Bitrix24.AddCustomTaskField(URL, Type, Name, ExternalID, Title, Signature, Token);