Can we enable Subscription 360 on Contact?

Summary:

We've tried to enable Subscription 360 Mashup on the Contact object. However, it does not pull up the associated Subscription records. We have used the parameter as PartyId=Registry ID while enabling the mashup on the Contact object.

This is working fine as expected for the Account object, so I'm assuming that a change in the mashup enablement parameter might do the job.

Does anyone know the solution?

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