Conditional. This property is only present when a limit query parameter is provided in the request. When making a paginated request, the API will return a number of results as specified by the limit parameter. If more results exist, then the response will contain a next_page attribute, which will include an offset, a relative path attribute, and a full uri attribute. If there are no more pages available, next_page will be null and no offset will be provided. Note that an offset token will expire after some time, as data may have changed.