Pass the optional and required parameters as per the official API docs. See the DTO reference below for more information. 
package com.example.myapp;

@RestController
public class APIController {

    private static IKeyService keyService = new KeyService();

    @PutMapping("/update")
    public ResponseEntity<String> updateKey(
            @RequestParam String keyId,
            @RequestBody Map<String, Object> keyUpdateRequest,
            @RequestHeader("Authorization") String authToken
    ) {
        // Delegate the creation of the key to the KeyService
        return keyService.updateKey(keyUpdateRequest, authToken, keyId);
    }
}

​
DTOs Reference

The DTOs used in the code for a better understanding of request and response bodies.

​
Request

Take the reference from the official API docs for update request parameters. Only pass the parameters you want to update.

​
Response

“OK”