Weird error with Facebook Messenger Platform/bot Welcome Confugration

Question

I\'m getting a weird error while configuring welcome message for my Messenger bot. I\'ve been using the same code (as shown below) and it has just been working fine until last n

Answer 1

The docs are now updated, you need to define your payload in payload parameter now (a UTF-8 encoded string), eg:

"call_to_actions":[
    {
      "payload":"USER_DEFINED_PAYLOAD"
    }
]