Unable to add temporary assignment using REST API

Summary:

Followed the steps elaborated in the documentation -

https://docs.oracle.com/en/cloud/saas/human-resources/22a/farws/Add_a_Temporary_Assignment.html

but it is not working.

Error message - The specified operation is not supported for the invoked HTTP method. Please check the URL and the headers.

Content (required):

Method used - POST

Payload:

{

"actionCode":"TEMP_ASG" ,

"effectiveDate":"2022-03-08" ,

"businessUnitName":"****"

}

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):