POST method returning blank (.net 8)

Kinetic ERP
,
1 
        public static string SendRequest(HttpMethod method, string url, object data)
        {
            try
            {
                // Initialize HttpClient
                using HttpClient httpClient = new HttpClient();
                var (username, password, headers) = ParseUrl(url);

                // Set up basic authorization header
                string credentials = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username}:{password}"));
                httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", credentials);

                JsonSerializerOptions options = new JsonSerializerOptions() { DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull };
                // Serialize data object to JSON
                //string jsonData = JsonSerializer.Serialize(data, options);
                string jsonData = "{\"ds\":{\"PartDim\":[],\"PartPC\":[],\"EntityGLC\":[],\"Part\":[],\"PartAttch\":[],\"PartAudit\":[],\"PartBinInfo\":[],\"PartCOO\":[],\"PartCOPart\":[],\"PartLangDesc\":[],\"PartPlanningPool\":[],\"PartPlant\":[],\"PartPlantPlanningAttribute\":[],\"PartRestriction\":[],\"PartRestrictSubst\":[],\"PartRev\":[],\"PartRevAttch\":[],\"PartRevInspPlan\":[],\"PartRevInspPlanAttch\":[],\"PartRevInspVend\":[],\"PartSubs\":[],\"PartUOM\":[],\"PartWhse\":[],\"TaxExempt\":[]}}\r\n";

                // Create StringContent with JSON data
                StringContent content = new StringContent(jsonData, Encoding.UTF8, "application/json");
                if (headers != null)
                {
                    foreach (KeyValuePair<string, string> header in headers)
                    {
                        content.Headers.Add(header.Key, header.Value);
                    }
                }

                // Create HttpRequestMessage with specified method and URL
                HttpRequestMessage request = new HttpRequestMessage(method, url) { Content = content };

                // Send the request
                HttpResponseMessage response = httpClient.Send(request);

                // Handle response as needed
                if (response.IsSuccessStatusCode)
                {
                    string responseBody = response.Content.ReadAsStringAsync().Result;
                    return responseBody;
                }
                else
                {
                    return $"{method} Request failed. Status code: {response.StatusCode}";
                }
            }
            catch (HttpRequestException e)
            {
                return $"Request failed: {e.Message}";
            }
        }

I’m attempting a POST at this endpoint “/server/api/v1/Erp.BO.PartSvc/GetNewPart”. This method should return a part with default values. In the code above the responseBody = “”, with a StatusCode = 200.

Why is the responseBody a blank string instead of the expected default part?

2

Try sending just an empty ds object ds:{}