code: protected List<String> createEntity(JSONArray entities) throws AtlasServiceException {
          LOG.debug("Creating entities: {}", entities);
          JSONObject response = callAPIWithBody(API.CREATE_ENTITY, entities.toString());
          List<String> results = extractEntityResult(response).getCreatedEntities();
          LOG.debug("Create entities returned results: {}", results);
          return results;
      }
docs: Create the given entity
  @param entities entity(type instance) as json
  @return json array of guids
  @throws AtlasServiceException