public function getImageTrackingCode(
        $matomoUrl,
        $actionName = '',
        $idGoal = '',
        $revenue = '',
        array $optional = []
    )
    {
        return $this->_request('SitesManager.getImageTrackingCode', [
            'piwikUrl' => $matomoUrl,
            'actionName' => $actionName,
            'idGoal' => $idGoal,
            'revenue' => $revenue,
        ], $optional);
    }