public JObject ToJson()
        {
            JObject account = new JObject();

            byte[] shash = (ScriptHash);
            var    addr  = Helper_NEO.GetAddress_FromScriptHash(shash);

            account["address"]   = addr;
            account["label"]     = null;
            account["isDefault"] = false;
            account["lock"]      = false;
            account["key"]       = nep2key;
            account["contract"]  = ((NEP6Contract)Contract)?.ToJson();
            account["extra"]     = null;
            return(account);
        }