Safeguard Event Subscriptions for specific Email Address

All, is there a way to configure event subscription for an email address? We would just need events to be sent to a shared mailbox managed by security team. From powershell, we noticed there is New-SafeguardEventSubscription however it seems that it requires ObjectTypeToSubscribe and ObjectToSubscribe. Looking at swagger, ObjectTypeToSubscribe doesn't seem to cover appliance. Any advice on how we can achieve this? Thanks!

ObjectType:

[ Unknown, AccountGroup, Asset, AssetAccount, User, UserGroup, Role, DirectoryAccount, DirectoryProfile, IdentityProvider, AccessPolicy, AssetPartition, Directory, ArchiveServer, PartitionProfile, PartitionAccountPasswordRule, PartitionProfileCheckSchedule, PartitionProfileChangeSchedule, AccountDiscoverySchedule, DirectoryAccountPasswordRule, DirectoryProfileCheckSchedule, DirectoryProfileChangeSchedule, DirectoryAccountDiscoveryJob, ReasonCode, TicketSystem, AssetGroup, PartitionTag, PartitionTaggingRule, DynamicGroupingRule, DirectoryTag, DirectoryTaggingRule, StarlingSubscription, Registration, PartitionProfileSyncGroup, DirectoryProfileSyncGroup, SessionModuleConnection, A2AService, UserPersonalAccount, PersonalAccount, SshKeySyncGroup, StarlingRegisteredConnector ]