Sending audio to user in Facebook messenger bot

I'm trying to send audio file to user in Facebook messenger bot using file upload. Official documentation says you can do it through curl command in terminal. This command works: curl \ -F 'recipient={"id":user_id}' \ -F 'message={"attachment":{"type":"audio", "payload":{}}}' \ -F 'filedata=@mymp3.mp3;type=audio/mp3' \ "https://graph.facebook.com/v2.6/me/messages?access_token