actor property
Actor is the "org/sub" identity the run was executed and billed AS. Empty means there was no PERSON — a schedule or a service token — which is a different fact from "we do not know", and the difference is what an audit asks about.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? actor;