Interface PostbackEvent

Payload parameter that was defined with the button. This is only visible to the app that send the original template message.

Indicate whether the event is an echo.

Indicate whether the event is sent to a standby channel.

Referral information for how the user got into the thread.

Id of ad if referral.source is 'ADS'.

The optional ref attribute set in the referrer if referral exist.

The source of the referral if referral exist.

The user that triggered the webhook event.

Title for the CTA that was clicked on. This is sent to all apps subscribed to the page. For apps other than the original CTA sender, the postback event will be delivered via the standby channel.