Lists the activity recipient records in the account. Each record links one entry of a contact's activity feed (see GET /activities) to the contact it is about. A record is written for each new activity entry, always with reltype Subscriber and the contact id in relid. The activity entry's own subscriberid holds the same contact. Saving a change to an entry writes another record, so one entry can have several records. A merge moves the merged contact's records to the surviving contact. The list has no filters or sort options, and records come in no guaranteed order. It does not check the linked activity, so it can return records that GET /activityRecipients/{id} answers with 403. Page with limit and offset, or fetch specific records with ids.