PayPal Buttons and Webhook integration

I have a Paypal Button setup with the following code:

  paypal.Buttons({      createSubscription: function(data, actions) {        return actions.subscription.create({'plan_id': 'P-PLANID'        });      },      onApprove: function(data, actions) {        // Somehow pass info to Webhook      }  }).render('#paypal-button-container');

Is there a way to have this integrate with a webhook I have setup with BILLING.SUBSCRIPTION.ACTIVATED?

I just created the webhook but I am not sure how I connect my PayPal Buttons to it