Malformed JWT

[ahvahsky2008]

Не могу использовать вашу либу, так как там net.core, а у меня net4.6. Использую jose-jwt. Сервер ругается, говорит Malformed JWT. Не пойму что ему не нравится.

            string PrivKey = "{" +
                "\"kty\":\"EC\",\"alg\":\"ES256\",\"crv\":\"P-256\"," +
                "\"x\":\"pSH0jvbtVZiseTpJZk0_yfudEIv86uwjeH_gr1qmOGA\"," +
                "\"y\":\"eGdC9EIGmhCheM_T8vhS4Qwk7RfaPRBxF3W5omgBc_M\"," +
                "\"d\":\"DuSjR5eZBp5S-9HNKA8kRQFA_3Akkept-dTbwFoq_3w\"" +
                "}";

            var js = new JavaScriptSerializer();
            var jwk = js.Deserialize<IDictionary<string, string>>(PrivKey);


            byte[] x = Base64Url.Decode(jwk["x"]);
            byte[] y = Base64Url.Decode(jwk["y"]);
            byte[] d = Base64Url.Decode(jwk["d"]);


            var headers = new Dictionary<string, object>()
            {
                 { "kid", 2}
            };

            var payload = new Dictionary<string, object>()
                {
                    { "email", "bitzlato.demo@gmail.com" },
                    { "aud", "usr" },
                    { "iat", ts},
                    { "jti", Guid.NewGuid().ToString() },
                };

            var privateKey = EccKey.New(x, y, d);

            string token = Jose.JWT.Encode(payload, privateKey, JwsAlgorithm.ES256,headers);

            HttpClientHandler handler = new HttpClientHandler()
            {
                Proxy = new WebProxy("http://127.0.0.1:8888"),
                UseProxy = true,
            };
            var httpClient = new HttpClient(handler);
            httpClient.DefaultRequestHeaders.Authorization =
                new AuthenticationHeaderValue("Bearer", token);


            var who = Task.Run(async () => await
                httpClient.GetStringAsync("https://demo.bitzlato.com/api/auth/whoami")
            ).GetAwaiter().GetResult();