This API allows update of multiple file attributes for a filesystem denoted by fs_id, along with their custom fields. The custom field ids can be obtained using the Custom Fields API (https://{base-url}/openapi/custom_field/). Please read the request schema for more information. This endpoint should not be used to create new data objects. Either id or key must be provided for each file attribute object. The user must be a Server Admin or the FileSystem Admin with Source Admin or Catalog Admin role. Maximum payload size is 10,000 objects.