code: public function ipSetMonitoringNotifications($ip, $frequency = 'once', $email = '', $sms = array())
      {
          return json_decode(self::getClient()->ipSetMonitoringNotifications($this->id, $ip, $frequency, $email, $sms));
      }
docs: Set a monitoring notification on IP
  
  @param string $ip
  @param string $frequency
  @param string $email
  @param array $sms
  @return object