code: @Post("/node/obj")
      @ProducesJson
      public Response json2(@RequestObject JsonNode input) {
          final JsonNode name = input.get("name");
          return new Response(Response.SUCCESS, name.textValue());
      }
docs: Returns a {@link Response} object. The {@link ProducesJson} annotation makes an object be converted
  as JSON string by the {@link JacksonResponseConverterFunction}.