keyId property

The ID of the key used to sign the blob.

The key used for signing will remain valid for at least 12 hours after the blob is signed. To verify the signature, you can retrieve the public key in several formats from the following endpoints: - RSA public key wrapped in an X.509 v3 certificate: https://www.googleapis.com/service_accounts/v1/metadata/x509/{ACCOUNT_EMAIL}

• Raw key in JSON format: https://www.googleapis.com/service_accounts/v1/metadata/raw/{ACCOUNT_EMAIL}
• JSON Web Key (JWK): https://www.googleapis.com/service_accounts/v1/metadata/jwk/{ACCOUNT_EMAIL}