Spring boot: Sending a JSON to a post request that uses a model as a param - spring

Question

Lets say I have a predefined post mapping as such:
#PostMapping(value = "/add", produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<String> addVal(#RequestBody final valDetail newVal) {
//Do Stuff
}
and the valDetail object as follows:
#Data
#Component
#Entity
#Table(name = "val_portal")
public class valDetail {
#Id
#Column(name = "valcode")
private String valCode;
#Column(name = "valname")
private String valName;
}
How would I go about actually sending JSON values from a separate service to this /add endpoint so that they are properly received as a valDetail object?
Currently I tried this implementation but I keep getting a 415 response code.
JSONObject valDetail = new JSONObject();
valDetail.put("valCode",request.getAppCode().toLowerCase());
valDetail.put("valName", request.getProjectName());
String accessToken = this.jwtUtility.retrieveToken().get("access_token").toString();
HttpHeaders authHeaders = new HttpHeaders();
authHeaders.setBearerAuth(accessToken);
authHeaders.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> entity = new HttpEntity<String>(valDetail.toString(), authHeaders);
ResponseEntity<String> loginResponse = restTemplate.exchange(uri,
HttpMethod.POST,
entity,
String.class);

Answer 1

If you want to pass data as json you don't want to take Model try to use #ResponseBody annotation to transfer data through json.
#PostMapping(value = "/add", produces = MediaType.APPLICATION_JSON_VALUE)
#ResponseBody
public ResponseEntity<String> addVal(#RequestBody final valDetail newVal) {
//Do Stuff
}