public function getWeeklyTrackChart($methodVars)
    {
        $weeklytracks = array();
        
        // Check for required variables
        if (!empty($methodVars['user'])) {
            $vars = array(
                'method' => 'user.getweeklytrackchart',
                'api_key' => $this->auth->apiKey
            );
            $vars = array_merge($vars, $methodVars);

            if ($call = $this->apiGetCall($vars)) {
                $i = 0;
                foreach ($call->weeklytrackchart->track as $track) {
                    $weeklytracks[$i]['name'] = (string) $track->name;
                    $weeklytracks[$i]['rank'] = (string) $track['rank'];
                    $weeklytracks[$i]['artist']['name'] = (string) $track->artist;
                    $weeklytracks[$i]['artist']['mbid'] = (string) $track->artist['mbid'];
                    $weeklytracks[$i]['mbid'] = (string) $track->mbid;
                    $weeklytracks[$i]['playcount'] = (string) $track->playcount;
                    $weeklytracks[$i]['url'] = (string) $track->url;
                    $i++;
                }

                return $weeklytracks;
            } else {
                return false;
            }
        } else {
            throw new InvalidArgumentException('You must include artist variable in the call for this method');
        }
    }