Need help creating an application in Jira via Curl

[Sergey Kozachenko]

I form the application in Jira through Curl.
I pass this text:

{
    "fields": {
       "project":{"id": "10101"},
       "issuetype":{"id":"10100"},
       "components":[{"id":"10300"}],
       "assignee":{"name":"skozachenko"},
    "reporter":{"name":"anikonov"},
    "customfield_10100" : [{"name":"anikonov"}],
     "summary":"Test",
       "description":"Test"
   }
}

Формируется заявка

I want to add a field "Request type".

Which field name should I pass through Curl and which id?

[Nic Brough -Adaptavist-]

Request type is a Service Desk system field, not a simple custom field.  You need to use the JSD API to get to it.  See https://developer.atlassian.com/cloud/jira/service-desk/rest/

[Sergey Kozachenko]

I added the "requestTypeId" field. But I got the error back.
{"errorMessages": [], "errors": {"requestTypeId": "Field 'requestTypeId' can not be set. It is not on the appropriate screen, or unknown."}}

[Nic Brough -Adaptavist-]

It's not a simple field, it's an indicator of the type of request that a customer is raising in JSD.  Have a closer look at the Request calls in the API - you'll see it's not something you can just throw on a screen and edit.