Attendance Subscriber State Changes

Number of APIs: 2

1. Record a subscriber state by contact ids POST {{baseUrl}}/marketing/v3/marketing-events/attendance/:externalEventId/:subscriberState/create?externalAccountId=<string>

2. Record a subscriber state by contact email POST {{baseUrl}}/marketing/v3/marketing-events/attendance/:externalEventId/:subscriberState/email-create?externalAccountId=<string>