public function create($identity, $bindingType, $address, $options = array()) {
        $options = new Values($options);

        $data = Values::of(array(
            'Identity' => $identity,
            'BindingType' => $bindingType,
            'Address' => $address,
            'Tag' => Serialize::map($options['tag'], function($e) { return $e; }),
            'NotificationProtocolVersion' => $options['notificationProtocolVersion'],
            'CredentialSid' => $options['credentialSid'],
            'Endpoint' => $options['endpoint'],
        ));

        $payload = $this->version->create(
            'POST',
            $this->uri,
            array(),
            $data
        );

        return new BindingInstance($this->version, $payload, $this->solution['serviceSid']);
    }