Help - How to access request body in post request?

[jhrdt]

Hi,

Dump

POST /api/customer/show HTTP/1.1

HTTP/1.1 200 OK
Content-Type: application/json

{
    "id": "${request.body}",
    "name": "Name"
}

Request

http localhost:9999/api/customer/show  id=1

POST /api/customer/show HTTP/1.1
Host: localhost:9999
User-Agent: HTTPie/1.0.3
Accept-Encoding: gzip, deflate
Accept: application/json, */*
Connection: keep-alive
Content-Type: application/json
Content-Length: 11

{"id": "1"}
--------------------------------------------------------------------------------
HTTP/1.1 200 OK
Content-Type: application/json
Server: DeepfakeHTTP v6.4.2 (2022-01-23 14:42:00)
Content-Length: 48
ETag: "85fffc49"

{
    "id": "{"id": "1"}",
    "name": "Name"
}

Expectation

Response:

{
    "id": "1",
    "name": "Name"
}

Question

What do I need to do, if I want to access the "id" key in the request body?

I tried "id": "${request.body.id}" but this returns "id": "undefined".