related_record.updated

{
  "id": "link_public_id",
  "book_id": "book_public_id",
  "source_type": "Household",
  "source_id": "household_public_id",
  "target_type": "Contact",
  "target_id": "contact_public_id",
  "source_label": "Example household",
  "target_label": "Jane Doe",
  "relationship_to_source": "Client",
  "relationship_to_target": "Accountant",
  "created_at": "2026-10-15T12:00:00Z",
  "updated_at": "2026-10-15T12:05:00Z",
  "subscription_id": "subscription_public_id",
  "user_id": "user_public_id",
  "company_id": "company_public_id"
}