OptionalaudOptionalcauseOptionaldidOptionalexpExpiration time in seconds or null for no expiration
OptionaliatIssued at time in seconds
OptionalisOptionalmetaMetadata, omitted from the payload when empty
OptionalnonceOptionalnowThe current time in seconds. Mostly used for testing.
Proofs of the chain of authority
OptionalttlTime to live in seconds, expiration thats precedence over ttl
Invocation options