Query in the RSQL format, allowing to filter Volume Purchasing Location collection. Default filter is empty query - returning all results for the requested page. Fields allowed in the query: id, name, appleId, email, organizationName, tokenExpiration, countryCode, locationName, automaticallyPopulatePurchasedContent, sendNotificationWhenNoLongerAssigned, siteId and siteName. This param can be combined with paging and sorting.