private string SendRequest(string ip, string jsonRequest, int timeout, bool isOpen, string path, out string errorMessage)
{
    string jsonResponse = string.Empty;
    errorMessage = string.Empty;
    CertificateErrorMessage = string.Empty;

    ServicePointManager.Expect100Continue = true;
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
    ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(ValidateCertificate);
    string host = "https://" + jsonrpcServerIP + ":" + portNumber;
    Uri target = new Uri(host);

    try
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(ip);
        if (!isOpen)
        {
            request.CookieContainer = new CookieContainer();
            request.CookieContainer.Add(new Cookie("sysauth", token, path, target.Host));
        }
        request.ContentType = "application/json";
        request.Method = "POST";
        request.Timeout = timeout;

        X509Certificate clientCertificate = CertificateHelper.FetchWindowsClientCertificate();

        if (clientCertificate != null)
        {
            request.ClientCertificates.Add(clientCertificate);
        }

        using (var streamWriter = new StreamWriter(request.GetRequestStream()))
        {
            streamWriter.Write(jsonRequest);
            streamWriter.Flush();
            streamWriter.Close();
        }

        WebResponse response = request.GetResponse();
        using (var streamReader = new StreamReader(response.GetResponseStream()))
        {
            jsonResponse = streamReader.ReadToEnd();
        }
    }
    catch (Exception ex)
    {
        errorMessage = ex.Message;
    }
    
    return jsonResponse;
}