Button sending problem

Your content format is wrong ​@Gvb_records 

Check the documentation here: https://api.manychat.com/swagger#/

And here: https://manychat.github.io/dynamic_block_docs/channels/

And try something like this:

{
  "subscriber_id": 0,
  "data": {
  "version": "v2",
  "content": {
    "type": "instagram",
    "messages": [
      {
        "type": "text",
        "text": "simple text with button",
        "buttons": [
          {
            "type": "url",
            "caption": "External link",
            "url": "https://manychat.com"
          }
        ]
      }
    ],
    "actions": [],
    "quick_replies": []
  }
 }
}

Hope this helps!

PS: i didn’t check the code, there may be missing or extra curly brackets there!