public byte[] Serialize(IDictionary <string, JToken> unkownNodes)
        {
            var cache = new CacheSerializationContract(unkownNodes);

            foreach (var token in _accessor.GetAllAccessTokens())
            {
                cache.AccessTokens[token.GetKey()
                                   .ToString()] = token;
            }

            foreach (var token in _accessor.GetAllRefreshTokens())
            {
                cache.RefreshTokens[token.GetKey()
                                    .ToString()] = token;
            }

            foreach (var token in _accessor.GetAllIdTokens())
            {
                cache.IdTokens[token.GetKey()
                               .ToString()] = token;
            }

            foreach (var accountItem in _accessor.GetAllAccounts())
            {
                cache.Accounts[accountItem.GetKey()
                               .ToString()] = accountItem;
            }

            foreach (var appMetadata in _accessor.GetAllAppMetadata())
            {
                cache.AppMetadata[appMetadata.GetKey()
                                  .ToString()] = appMetadata;
            }

            return(cache.ToJsonString()
                   .ToByteArray());
        }