docs: def get_queryset(self):
          """Return the allowed queryset for this sign or the default one."""
          if 'sign' in self.request.query_params:
              try:
                  filter_and_actions = unsign_filters_and_actions(
                      self.request.query_params['sign'],
                      '{}.{}'.format(
                          self.queryset.model._meta.app_label,
                          self.queryset.model._meta.model_name,
                      )
                  )
              except signing.BadSignature:
                  return super(SignedViewSetMixin, self).get_queryset()
              else:
                  for filtered_action in filter_and_actions:
                      try:
                          qs = self.queryset.filter(**filtered_action['filters'])
                      except FieldError:
                          continue
                      return qs
          return super(SignedViewSetMixin, self).get_queryset()