https://identity.foundation/EcdsaSecp256k1RecoverySignature2020/#blockchainAccountId
Optional
ISO date time string
https://www.w3.org/TR/xmlschema11-2/#dateTimeStamp
"2024-12-10T15:28:32Z" Copy
"2024-12-10T15:28:32Z"
See
https://identity.foundation/EcdsaSecp256k1RecoverySignature2020/#blockchainAccountId