def get_content_properties(self, content_id, expand=None, start=None, limit=None, callback=None):
        """
        Returns a paginated list of content properties.

        Content properties are a key / value store of properties attached to a piece of Content.
        The key is a string, and the value is a JSON-serializable object.
        :param content_id (string): A string containing the id of the property content container.
        :param expand (string): OPTIONAL: A comma separated list of properties to expand on the content properties.
                                Default: Empty.
        :param start (int): OPTIONAL: The start point of the collection to return. Default: None (0).
        :param limit (int): OPTIONAL: The limit of the number of items to return, this may be restricted by fixed
                            system limits. Default: 10.
        :param callback: OPTIONAL: The callback to execute on the resulting data, before the method returns.
                         Default: None (no callback, raw data returned).
        :return: The JSON data returned from the content/{id}/property endpoint, or the results of the
                 callback. Will raise requests.HTTPError on bad input, potentially.
        """
        params = {}
        if expand:
            params["expand"] = expand
        if start is not None:
            params["start"] = int(start)
        if limit is not None:
            params["limit"] = int(limit)
        return self._service_get_request("rest/api/content/{id}/property".format(id=content_id),
                                         params=params, callback=callback)