Missing Params while try to Update Ticket Description using Web Request

Happy new year Everyone

I’m trying to put ticket description using Workflow Automator - Web Request as below:

{
  "ticket": {
    "type": "Incident",
    "description": "",
    "description_text": ""
    },
  }

And here’s response:

{
  "code": "missing_params",
  "message": "Your update call does not have any parameter. Atleast one parameter is required."
}

With the following Header:

{
  "Date": "Sun, 01 Jan 2023 02:00:34 GMT",
  "Content-Type": "application/json; charset=utf-8",
  "Transfer-Encoding": "chunked",
  "Connection": "keep-alive",
  "Status": "400 Bad Request",
  "Cache-Control": "no-cache, no-store, max-age=0, must-revalidate",
  "X-Freshservice-Api-Version": "latest=v2; requested=v2",
  "Pragma": "no-cache",
  "X-Xss-Protection": "1; mode=block",
  "X-Request-Id": "1bbd4299-7649-4a8f-967f-f4cc2ffe11af",
  "X-Frame-Options": "SAMEORIGIN",
  "X-Content-Type-Options": "nosniff",
  "Expires": "Wed, 13 Oct 2010 00:00:00 UTC",
  "X-Envoy-Upstream-Service-Time": "37",
  "X-Fw-Ratelimiting-Managed": "true",
  "X-Ratelimit-Total": "140",
  "X-Ratelimit-Remaining": "139",
  "X-Ratelimit-Used-Currentrequest": "1",
  "X-Trace-Id": "00-06e8715a420aa52a4ace18ee707f8cfb-4e95fcc7cd9052ba-00",
  "Nel": "{ \"report_to\": \"nel-endpoint-freshservice\", \"max_age\": 60, \"include_subdomains\": true}",
  "Report-To": "{ \"group\": \"nel-endpoint-freshservice\", \"max_age\": 60, \"include_subdomains\": true, \"endpoints\": [{\"url\": \"https://edge-admin.us-east-1.freshedge.net/nelreports/freshservice\"}]}",
  "Server": "fwe"
}