code: def set_json(self, reason='', new_page=False):
          
          compressed_json = json.dumps(self._compress_json(self.cached_json))
  
          if len(compressed_json) > self.max_page_size:
              raise OverflowError(
                  'Usernotes page is too large (>{0} characters)'.
                  format(self.max_page_size)
              )
  
          if new_page:
              self.subreddit.wiki.create(
                  self.page_name,
                  compressed_json,
                  reason
              )
              # Set the page as hidden and available to moderators only
              self.subreddit.wiki[self.page_name].mod.update(False, permlevel=2)
          else:
              self.subreddit.wiki[self.page_name].edit(
                  compressed_json,
                  reason
              )
docs: Send the JSON from the cache to the usernotes wiki page.
  
          Arguments:
              reason: the change reason that will be posted to the wiki changelog
                  (str)
          Raises:
              OverflowError if the new JSON data is greater than max_page_size