But not able to post the request on behalf of this customer from the Rest API (Postman).
I have gone thru out from the below link and followed the instruction mansion on below link.
I am sharing the Post request content for your more easy reference to get more clearance about the concern.
authorization part I have given the admin login credential that I have use during creation of customer.
header 'Accept: application/json' header 'Content-Type: application/json'
"summary": "Request JSD help via REST",
"description": "I need a new *mouse* for my Mac"