toJson method
Implementation
@override
Map<String, Object?> toJson() {
final data = super.toJson();
data['sender_key'] = senderKey;
data['sender_claimed_ed25519_key'] = senderClaimedEd25519Key;
data['forwarding_curve25519_key_chain'] = forwardingCurve25519KeyChain;
return data;
}