Response of merchant
{
  "response": "Tunnel ec06cb04.ngrok.io not found",
  "status": {
    "url": "https://ec06cb04.ngrok.io/Callback",
    "content_type": "text/plain",
    "http_code": 404,
    "header_size": 72,
    "request_size": 190,
    "filetime": -1,
    "ssl_verify_result": 0,
    "redirect_count": 0,
    "total_time": 1.394097,
    "namelookup_time": 0.01237,
    "connect_time": 0.106601,
    "pretransfer_time": 0.29831,
    "size_upload": 3095,
    "size_download": 34,
    "speed_download": 24,
    "speed_upload": 2220,
    "download_content_length": 34,
    "upload_content_length": 3095,
    "starttransfer_time": 1.299419,
    "redirect_time": 0,
    "redirect_url": "",
    "primary_ip": "3.14.212.173",
    "certinfo": "",

  },
  "error": "",
  "errno": 0
}