Available options:
rewards/store_fulfilment,
customers/update,
loyalty_emails/unsubscribe,
program_events/customer.enrolled,
program_events/customer.tier_upgraded,
program_events/customer.tier_downgraded,
program_events/customer.points_earned,
program_events/customer.reward_available_notification,
program_events/customer.recurring_reward_available_reminder,
program_events/customer.claimed_reward,
program_events/customer.referral_complete,
program_events/customer.rule_completed,
program_events/customer.approaching_tier_upgrade,
program_events/customer.moved_to_at_risk_segment,
program_events/customer.moved_to_defected_segment,
program_events/customer.moved_to_loyal_segment,
program_events/customer.approaching_points_expiration,
program_events/customer.approaching_reward_expiration