public function updateProperties($properties = array())
    {
        //check whether worksheet name is set or not
        if ($this->worksheetName == '')
            throw new Exception('Worksheet name not specified');

        $strURI = Product::$baseProductUri . '/cells/' . $this->getFileName() .
            '/workbook/worksheets/' . $this->worksheetName;

        $signedURI = Utils::sign($strURI);

        $json_data = json_encode($properties);

        $responseStream = Utils::processCommand($signedURI, 'POST', 'json', $json_data);
        $json = json_decode($responseStream);
        if ($json->Code == 200)
            return $json->Worksheet;
        else
            return false;

    }