How to specify using PushSubscriptionRequest to get notifications on any DistinguishedFolder recursively?

We want to get all appointment and contact notifications, regardless of how many levels down in the folder hierarchy the objects are, hopefully without having to create a subscription request for each folder in the hierarchy.

We want to use PushSubscriptionRequest for that purpose.

The folders under contacts folder can be multi level deep and subject to user change.

E.g.

contacts/level1/level2/level3/contact1

I need to get notified if contact1 is changed

or a new contact gets added in level3.

Is there anyway to specify this in PushSubscriptionRequest  http://msdn.microsoft.com/en-us/library/aa563599(v=exchg.140).aspx) ?

Thanks.