CMX Notification - Limit information sent

Is it possible to limit the information sent in Location Update Notifications? Although the MAC addresses can be hashed, in this notification is also sent the client IP address and the SSID and we don't want to send this information.

If we cannot modify the Location Update content, is there another way I could have the same information directly from the CMX (e.g. using a script to get only the data that is useful for us?).

The notification subscription api is filtered by type, and other rules, but each returns a block of data, for example in/out type for a single mac address.  We have sample code and a new learning lab which may be helpful.  See Cisco DevNet Learning Labs