Solution : Changed the Content-type in headers text/html to application/Json for this error code 415, Issue has been fixed.
Details : I am using limited fields which are there in Create screen,
Requirement : Create issue in Jira and Create Link for another issue type
Here is my Payload :
{
"fields":{
"project":{
"key":"APPI"
},
"summary":"Test_Postman1",
"description":"Test description",
"Priority":"High",
"issuetype":{
"name":"Task"
},
"assignee":{
"name":"XYZ"
},
"reporter":{
"name":"Anna",
"customfield_10010":"Start a New Portal Issue Ticket"
}
}
}