This data structure is part of the Presence Interface.
Data containing which users presence has changed
|void* ClientData||Client-specified data passed into EOS_Presence_AddNotifyOnPresenceChanged|
|EOS_EpicAccountId LocalUserId||The Epic Account ID of the local user who is being informed for PresenceUserId's presence change|
|EOS_EpicAccountId PresenceUserId||The Epic Account ID of the user who had their presence changed|