Encrypted transaction payload as returned by the API. Discriminate on encrypted_state:
encrypted_state
"encrypted"
"failed_decryption"
"decrypted"
Encrypted transaction payload as returned by the API. Discriminate on
encrypted_state:"encrypted"/"failed_decryption"→ EncryptedEncryptedTransactionPayloadResponse"decrypted"→ DecryptedEncryptedTransactionPayloadResponse