Rest _post returning back the request JSON

Hi,
I am facing issue where the JSON response is always having the request JSON fields. I am not doing any kind of mapping but still it is happening.

How can I disable this function?

Sample Input:
{
“id”: “12333333”,
“xxx”: true
}

Output:
{
“output”: {
“status”: “200”,
“RequestId”: “2d868727-c214-4f90-b468-56ae5b3655b1”
},
“id”: “12333333”,
“xxx”: true
}

I am using 9.6

issue resolve by declaring the input fields and explicitly dropping them…