HttpWebRequest вместо httpClient

HttpClient httpClient = new HttpClient { BaseAddress = baseAddress };
httpClient.DefaultRequestHeaders.Add("ACCESS-KEY", KEY);
httpClient.DefaultRequestHeaders.Add("ACCESS-SIGNATURE", SIGNATURE);
httpClient.DefaultRequestHeaders.Add("ACCESS-TIMESTAMP", TIMESTAMP);
 
var response = await httpClient.PostAsync($"{path}", 
new StringContent(JsonConvert.SerializeObject(httpContent), Encoding.UTF8, "application/json"));

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(baseAddress + path);
request.Method = "POST";
request.ContentType = "application/json; charset=utf-8";
request.Accept = "application/json";
request.Headers.Add("ACCESS-KEY", KEY);
request.Headers.Add("ACCESS-SIGNATURE", SIGNATURE);
request.Headers.Add("ACCESS-TIMESTAMP", TIMESTAMP);
 
String stringToByte = JsonConvert.SerializeObject(httpContent);
byte[] data = Encoding.UTF8.GetBytes(stringToByte);
 
request.ContentLength = data.Length;
using (Stream reqStream = request.GetRequestStream())
{
       reqStream.Write(data, 0, data.Length);
}
 
HttpWebResponse resp = (HttpWebResponse)(await request.GetResponseAsync();