Indicate whether the event is an echo.
Indicate whether the event is sent to a standby channel.
Message ID.
Reference to the product id when the user sends a message from Facebook Shops product detail page.
Reference to the message id (mid) that this message is replying to.
The user that triggered the webhook event.
Persistent id of the sticker if a sticker is sent.
URL of the attachment type.
Generated using TypeDoc
This callback will occur when an image message has been sent to your Page.
messages
Check official reference.