Need help creating an application in Jira via Curl

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?