public static function insert_scorm_tracks_parameters() {
        return new external_function_parameters(
            array(
                'scoid' => new external_value(PARAM_INT, 'SCO id'),
                'attempt' => new external_value(PARAM_INT, 'attempt number'),
                'tracks' => new external_multiple_structure(
                    new external_single_structure(
                        array(
                            'element' => new external_value(PARAM_RAW, 'element name'),
                            'value' => new external_value(PARAM_RAW, 'element value')
                        )
                    )
                ),
            )
        );
    }