code: public function setIPBlockProperties($ipblock,$description)
      {
  		$payload = array(
  			'description' => $description
  		 );
  	
          try {
              $r = $this->put('ip/' . urlencode($ipblock), array('Content-Type' => 'application/json;charset=UTF-8'), json_encode($payload))->send();
          } catch (\Exception $e) {
              throw new IpException($e->getMessage(), $e->getCode(), $e);
          }
          return $r->getBody(true);
      }
docs: set IPBlockProperties
  
  @param string $description
  @return string Json
  @throws Exception\IpException
  @throws Exception\IpNotFoundException
  
  only seems to return null on success