HttpEntity<?> entity = getHttpEntity(request);
ResponseEntity<UpgradeInstanceResponse> result =
restTemplate.exchange(endpoint, HttpMethod.POST, entity, UpgradeInstanceResponse.class);
HttpEntity<?> entity = getHttpEntity(request);
ResponseEntity<UpgradeInstanceResponse> result =
restTemplate.exchange(endpoint, HttpMethod.POST, entity, UpgradeInstanceResponse.class);