diff --git a/sample/index.php b/sample/index.php
index daeb2d9..a23facd 100644
--- a/sample/index.php
+++ b/sample/index.php
@@ -1175,6 +1175,17 @@ if (PHP_SAPI == 'cli') {
                             </div>
                         </div>
                     </li>
+                    <li class="list-group-item">
+                        <div class="row">
+                            <div class="col-md-8"><h5>Validate Webhook Event</h5></div>
+                            <div class="col-md-4">
+                                <a href="notifications/ValidateWebhookEvent.php" class="btn btn-primary pull-left execute"> Try It <i
+                                        class="fa fa-play-circle-o"></i></a>
+                                <a href="doc/notifications/SearchWebhookEvents.html" class="btn btn-default pull-right">Source <i
+                                        class="fa fa-file-code-o"></i></a>
+                            </div>
+                        </div>
+                    </li>
                 </ul>
             </div>
 
diff --git a/sample/notifications/ValidateWebhookEvent.php b/sample/notifications/ValidateWebhookEvent.php
index 3e24a17..8dbb134 100644
--- a/sample/notifications/ValidateWebhookEvent.php
+++ b/sample/notifications/ValidateWebhookEvent.php
@@ -1,34 +1,42 @@
 <?php
 
+use \PayPal\Api\VerifyWebhookSignature;
+use \PayPal\Api\WebhookEvent;
+
 $apiContext = require __DIR__ . '/../bootstrap.php';
 
 // # Validate Webhook
 // PHP Currently does not support certificate chain validation, that is necessary to validate webhook directly, from received data
-// To resolve that, we need to use alternative, which includes making a GET call to obtain the data directly from PayPal.
-
-//
-// ## Received Body from Webhook
-// Body received from webhook. This would be the data that you receive in the post request that comes from PayPal, to your webhook set URL.
-// This is a sample data, that represents the webhook event data.
-$bodyReceived = '{"id":"WH-36G56432PK518391U-9HW18392D95289106","create_time":"2015-06-01T20:21:13Z","resource_type":"sale","event_type":"PAYMENT.SALE.COMPLETED","summary":"Payment completed for $ 20.0 USD","resource":{"id":"2FY57107YS3937627","create_time":"2015-06-01T20:20:28Z","update_time":"2015-06-01T20:20:46Z","amount":{"total":"20.00","currency":"USD"},"payment_mode":"INSTANT_TRANSFER","state":"completed","protection_eligibility":"ELIGIBLE","protection_eligibility_type":"ITEM_NOT_RECEIVED_ELIGIBLE,UNAUTHORIZED_PAYMENT_ELIGIBLE","parent_payment":"PAY-2SV945219E505370PKVWL5DA","transaction_fee":{"value":"0.88","currency":"USD"},"links":[{"href":"https://api.sandbox.paypal.com/v1/payments/sale/2FY57107YS3937627","rel":"self","method":"GET"},{"href":"https://api.sandbox.paypal.com/v1/payments/sale/2FY57107YS3937627/refund","rel":"refund","method":"POST"},{"href":"https://api.sandbox.paypal.com/v1/payments/payment/PAY-2SV945219E505370PKVWL5DA","rel":"parent_payment","method":"GET"}]},"links":[{"href":"https://api.sandbox.paypal.com/v1/notifications/webhooks-events/WH-36G56432PK518391U-9HW18392D95289106","rel":"self","method":"GET"},{"href":"https://api.sandbox.paypal.com/v1/notifications/webhooks-events/WH-36G56432PK518391U-9HW18392D95289106/resend","rel":"resend","method":"POST"}]}';
-
+// To resolve that, we need to use alternative, which makes a call to PayPal's verify-webhook-signature API.
 /**
  * This is one way to receive the entire body that you received from PayPal webhook. This is one of the way to retrieve that information.
  * Just uncomment the below line to read the data from actual request.
  */
-/** @var String $bodyReceived */
-// $bodyReceived = file_get_contents('php://input');
+/** @var String $requestBody */
+$requestBody = '{"id":"WH-9UG43882HX7271132-6E0871324L7949614","event_version":"1.0","create_time":"2016-09-21T22:00:45Z","resource_type":"sale","event_type":"PAYMENT.SALE.COMPLETED","summary":"Payment completed for $ 21.0 USD","resource":{"id":"80F85758S3080410K","state":"completed","amount":{"total":"21.00","currency":"USD","details":{"subtotal":"17.50","tax":"1.30","shipping":"2.20"}},"payment_mode":"INSTANT_TRANSFER","protection_eligibility":"ELIGIBLE","protection_eligibility_type":"ITEM_NOT_RECEIVED_ELIGIBLE,UNAUTHORIZED_PAYMENT_ELIGIBLE","transaction_fee":{"value":"0.91","currency":"USD"},"invoice_number":"57e3028db8d1b","custom":"","parent_payment":"PAY-7F371669SL612941HK7RQFDQ","create_time":"2016-09-21T21:59:02Z","update_time":"2016-09-21T22:00:06Z","links":[{"href":"https://api.sandbox.paypal.com/v1/payments/sale/80F85758S3080410K","rel":"self","method":"GET"},{"href":"https://api.sandbox.paypal.com/v1/payments/sale/80F85758S3080410K/refund","rel":"refund","method":"POST"},{"href":"https://api.sandbox.paypal.com/v1/payments/payment/PAY-7F371669SL612941HK7RQFDQ","rel":"parent_payment","method":"GET"}]},"links":[{"href":"https://api.sandbox.paypal.com/v1/notifications/webhooks-events/WH-9UG43882HX7271132-6E0871324L7949614","rel":"self","method":"GET"},{"href":"https://api.sandbox.paypal.com/v1/notifications/webhooks-events/WH-9UG43882HX7271132-6E0871324L7949614/resend","rel":"resend","method":"POST"}]}';
+
+$signatureVerification = new VerifyWebhookSignature();
+$signatureVerification->setAuthAlgo("SHA256withRSA");
+$signatureVerification->setTransmissionId("d938e770-8046-11e6-8103-6b62a8a99ac4");
+$signatureVerification->setCertUrl("https://api.sandbox.paypal.com/v1/notifications/certs/CERT-360caa42-fca2a594-a5cafa77"); // todo: this isn't going to work
+$signatureVerification->setWebhookId("9XL90610J3647323C");
+$signatureVerification->setTransmissionSig("eDOnWUj9FXOnr2naQnrdL7bhgejVSTwRbwbJ0kuk5wAtm2ZYkr7w5BSUDO7e5ZOsqLwN3sPn3RV85Jd9pjHuTlpuXDLYk+l5qiViPbaaC0tLV+8C/zbDjg2WCfvtf2NmFT8CHgPPQAByUqiiTY+RJZPPQC5np7j7WuxcegsJLeWStRAofsDLiSKrzYV3CKZYtNoNnRvYmSFMkYp/5vk4xGcQLeYNV1CC2PyqraZj8HGG6Y+KV4trhreV9VZDn+rPtLDZTbzUohie1LpEy31k2dg+1szpWaGYOz+MRb40U04oD7fD69vghCrDTYs5AsuFM2+WZtsMDmYGI0pxLjn2yw==");
+$signatureVerification->setTransmissionTime("2016-09-21T22:00:46Z");
+
+
+$webhookEvent = new WebhookEvent();
+$webhookEvent->fromJson($requestBody);
+$signatureVerification->setWebhookEvent($webhookEvent);
+$request = clone $signatureVerification;
 
-// ### Validate Received Event Method
-// Call the validateReceivedEvent() method with provided body, and apiContext object to validate
 try {
-    /** @var \PayPal\Api\WebhookEvent $output */
-    $output = \PayPal\Api\WebhookEvent::validateAndGetReceivedEvent($bodyReceived, $apiContext);
+    /** @var \PayPal\Api\VerifyWebhookSignatureResponse $output */
+    $output = $signatureVerification->post($apiContext);
 } catch (Exception $ex) {
     // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
-    ResultPrinter::printError("Validate Received Webhook Event", "WebhookEvent", null, $bodyReceived, $ex);
+    ResultPrinter::printError("Validate Received Webhook Event", "WebhookEvent", null, $request->toJSON(), $ex);
     exit(1);
 }
 
 // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
-ResultPrinter::printResult("Validate Received Webhook Event", "WebhookEvent", $output->getId(), $bodyReceived, $output);
+ResultPrinter::printResult("Validate Received Webhook Event", "WebhookEvent", $output->getVerificationStatus(), $request->toJSON(), $output);