你能幫我在c#中提出一個post請求嗎？這是卷曲：curl -X POST https://api.test.com/call \  -H "Content-Type: application/json" \  -H "Authorization: Token token=YOUR_TOKEN" \  -d '{"amount":10.00, "id":"123", "customer":{"external_id":"100"}, "receiver":{"external_id":"200"}}'我嘗試這樣做：string myJson = "{"amount":10.00, "id":"123", "customer":{"external_id":"100"}, "receiver":{"external_id":"200"}}";    using (var client = new HttpClient())                {                    client.BaseAddress = new Uri("https://api.test.com");                                        client.DefaultRequestHeaders.Add("APIAccessToken", "myToken");                                   var content = new StringContent(myJson, Encoding.UTF8, "application/json");                    var response = await client.PostAsync("https://api.test.com/call/", content);                    resultContent = await response.Content.ReadAsStringAsync();                }但是收到錯誤的請求響應 400 錯誤。我是新手，將感謝您的幫助。