         requestNode = objectMapper.createObjectNode();         requestNode.put("type", "myType");          httpPost = new HttpPost(                 SERVER_URL_PREFIX + RestUrls.createRelativeResourceUrl(RestUrls.URL_PROCESS_INSTANCE_IDENTITYLINKS_COLLECTION, processInstance.getId()));         httpPost.setEntity(new StringEntity(requestNode.toString()));         closeResponse(executeRequest(httpPost, HttpStatus.SC_BAD_REQUEST));          // Test with 