code: public Map<String, Object> retrieve(String entityName, String groupId, String entityId) throws MnoException {
  		return retrieve(entityName, groupId, entityId, getAuthenticatedClient());
  	}
docs: Fetch an entity by id
  
  @param entity
  name
  @param groupId
  customer group id
  @param entityId
  id of the entity to retrieve
  @return entity
  @throws MnoException