I subscribed my webhook to the 'feed' events, however. Is there any way to open the chatbot to the user that comments or do anything on the page?
Bearing in mind that I need to have a app scoped fb_id for that user to send messages to them.
Thanks.
Got it!
You can't exactly open the chatbot itself after a comment or post etc. What you can do is to POST"private_reply" to the user, then your chatbot webhook can monitor for any further messages.
To do so, you can use the following endpoint: https://developers.facebook.com/docs/graph-api/reference/v2.12/object/private_replies