docs: def subscribe_notice(self, access_token):
          """doc: http://open.youku.com/docs/doc?id=31
          """
          url = 'https://openapi.youku.com/v2/users/subscribe/notice.json'
          params = {
              'client_id': self.client_id,
              'access_token': access_token
          }
          r = requests.get(url, params=params)
          check_error(r)
          return r.json()