greeting.setMessage("Hello there!");
greeting.setTone(Tone.FRIENDLY);
final GreetingsBuilders builders = new GreetingsBuilders(requestOptions);
Request<EmptyRecord> createRequest = builders.create().input(greeting).build();
Response<EmptyRecord> response = restClient.sendRequest(createRequest).getResponse();
Assert.assertNull(response.getHeader(RestConstants.HEADER_CONTENT_TYPE));
@SuppressWarnings("unchecked")
CreateResponse<Long> createResponse = (CreateResponse<Long>)response.getEntity();
long id = createResponse.getId();