Record doesn't exist or ACL restricts the record retrieval

[vakalapudilikhi]

I have create a user customized webservice name Inbound Demo Integration. I have linked it with the incident table along with mapping assist. I am trying to access the Rest API explore POST and GET result. But,the GET from import set API is showing the following issue. How can I resolve it 

{ "error": { "message": "No Record found", "detail": "Record doesn't exist or ACL restricts the record retrieval" }, "status": "failure" }

 Thank you.

[nayanawadhiya1]

Could please share your code so that we can see and share our inputs.

[Ramachandra]

{
"caller_id" : "ffeabc384736021051528c1f316d43ba",
"category" : "network",
"short_description" : "ABC DEF 123 456",
"description" : "This update is coming from REST And SOAP Message"
}