public class WalletData
    {
        public string OwnerAlias { get; set; }
        public string OwnerPin { get; set; }
    }

 public WalletData GetWalletData(int nodeId)
        {
            using (DialogKioskEntities context = new DialogKioskEntities())
            {
                var data = context.Nodes
                               .Where(n => n.NodeId == nodeId)
                               .Select(n => new
                               {
                                   ez = n.EzWallet
                               })
                               .FirstOrDefault();

                WalletData wd = JsonConvert.DeserializeObject<WalletData>(data.ez.ToString());

                return wd;
            }
        }