var client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Post, "https://id.nes.com.tr/v1/pat");
request.Headers.Add("Authorization", "Bearer {TOKEN}");
var content = new StringContent("JSON_BODY", null, "application/json");
request.Content = content;
var response = await client.SendAsync(request);
response.EnsureSuccessStatusCode();
Console.WriteLine(await response.Content.ReadAsStringAsync());