post

       public async static Task<string> PostRequestSendReadyDocument()
        {
            using (var httpClient = new HttpClient())
            {
                using (var request = new HttpRequestMessage(new HttpMethod("POST"), "https://api.getaccept.com/v1/documents/595d2hrwg4j/send"))
                {
                    var key = PostRequestAuthKey().Result;
                    request.Headers.TryAddWithoutValidation("Authorization", "Bearer "+ key);
                    request.Content = new StringContent("\t\n{\n\t  \"sender_id\": \"5qr8darqd3r\"\n\t}\n");
                    request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
                    var response = await httpClient.SendAsync(request);
                    string responseBody = await response.Content.ReadAsStringAsync();
                    string prettyJson = JToken.Parse(responseBody).ToString();
                    Console.WriteLine(prettyJson);
                    return prettyJson;
                }
            }
        }