for messageIdentifier, requestedSa := range stopAreasToRequest {
        entry := &siri.SIRIStopMonitoringSubscriptionRequestEntry{
            SubscriberRef:          subscriber.connector.Partner().RequestorRef(),
            SubscriptionIdentifier: string(requestedSa.subId),
            InitialTerminationTime: subscriber.Clock().Now().Add(48 * time.Hour),