code: def export(self):
          organizations = {}
          orgs = api.registry(self.db)
          for org in orgs:
              domains = [{'domain': dom.domain,
                          'is_top': dom.is_top_domain}
                         for dom in org.domains]
              domains.sort(key=lambda x: x['domain'])
              organizations[org.name] = domains
          obj = {'time': str(datetime.datetime.now()),
                 'blacklist': [],
                 'organizations': organizations,
                 'uidentities': {}}
          return json.dumps(obj, default=self._json_encoder,
                            indent=4, separators=(',', ': '),
                            sort_keys=True)