code: @GetMapping(value = "/{entityTypeId}/meta", produces = APPLICATION_JSON_VALUE)
    public EntityTypeResponse retrieveEntityType(
        @PathVariable("entityTypeId") String entityTypeId,
        @RequestParam(value = "attributes", required = false) String[] attributes,
        @RequestParam(value = "expand", required = false) String[] attributeExpands) {
      Set<String> attributeSet = toAttributeSet(attributes);
      Map<String, Set<String>> attributeExpandSet = toExpandMap(attributeExpands);
  
      EntityType meta = dataService.getEntityType(entityTypeId);
      return new EntityTypeResponse(
          meta, attributeSet, attributeExpandSet, permissionService, dataService);
    }
docs: Gets the metadata for an entity
  
  <p>Example url: /api/v1/person/meta
  
  @return EntityType