PayHubWebhookNotification

Server-to-server webhook payload PayHub posts on payment settlement or cancellation.
A "payment" notification finalizes the payment (order is created); a "cancellation"
notification voids the pending payment (no order is created).
The cancellation payload only carries PaymentRequestId, PaymentRequestCode, Type and CreatedAt.

{ "paymentRequestId": 0, "paymentId": 0, "provider": "string", "bankOrderId": "string", "amount": 0, "type": "string", "paymentRequestCode": "string", "createdAt": "2019-08-24T14:15:22.123Z", "metadata": { "property1": null, "property2": null } }