Spring RestTemplate post object not not sending in request?

I am consuming a web service using RestTemplate and my POST request is as follows.

RestTemplate requestTemplate = new RestTemplate();

MappingJackson2HttpMessageConverter jsonHttpMessageConverter = new MappingJackson2HttpMessageConverter();
        jsonHttpMessageConverter.getObjectMapper().configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);

        requestTemplate.getMessageConverters().add(jsonHttpMessageConverter);
String uuidResult = requestTemplate.postForObject(url, requestBodyJsonObject ,
                String.class);

I tried printing my requestBodyJsonObject and put it in a rest client, it works fine so no issue with request body. But here I am not getting the expected result and just getting the result when I send a post request without a request body from rest client.

So I am clueless here. Your help would be highly appreciated.