How to set the request type value in JIRA service desk using C sharp code

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C#

REST

Jira

I am trying to set the request type field value in JIRA service desk request using C sharp code as shown below.

<pre>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace JiraConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Jira objJira = new Jira();
            objJira.JiraUrl = "https://xxxx.atlassian.net";

        
            objJira.JiraJson = @"{""fields"":{
                ""project"": {""key"": ""xxxx""},
                ""issuetype"": {""name"": ""Incident""},
                ""serviceDeskId"": ""1"",
                ""requestTypeId"": ""1"",
                ""requestFieldValues"": {
                    ""summary"": ""This is an automated ticket for Testing"",
                    ""description"": ""Test - ignore this""
                }
            }}";

            objJira.JiraUserName = "xxxxx";
            objJira.JiraPassword = "jkl;UIOP&*()";
            Console.WriteLine(objJira.addJiraIssue());
            Console.ReadKey();
        }
    }
}

And not sure if I am the way I have declared the value for serviceDeskId and requestTypeId is correct when I try to create a normal issue in JIRA it seems to work fine but when setting the service desk and request type id's I am getting the error saying its a unknown error.

Please help me find the issue on how the fields serviceDeskId and requestTypeId needs to be declared.

What I have tried:

I have tried a similar meta data using REST client and it seems to work fine without any issues

{
"serviceDeskId": "1",
"requestTypeId": "1",
"requestFieldValues": {
"summary": "Request JSD help via REST1",
"description": "I need a new mouse for my Mac"
}
}