public function getScales($computerId)
    {
        $endPointUrl = $this->apiurl."/computer/";
        $endPointUrl.= $computerId;
        $endPointUrl.= '/scales';

        $response = $this->curlGet($endPointUrl);


        if ($response->getStatusCode() != '200') {
            throw new \RuntimeException(
                sprintf(
                    'HTTP Error (%d): %s',
                    $response->getStatusCode(),
                    $response->getStatusMessage()
                )
            );
        }

        return Entity::makeFromResponse("PrintNode\Scale", json_decode($response->getContent()));
    }