Power BI Embedded API - Updating a specific table in dataset

I tried this but it still did not work.

After looking into details I think the issue is around how I code my request body in JSON. Beacause when I used following code it started working and I can see Enhanced API as request type in PBI service.

Following the final code I used:

var body = @"{
                " + "\n" +
                @"    ""type"": ""Full"",
                " + "\n" +
                @"    ""commitMode"": ""transactional"",
                " + "\n" +
                @"    ""maxParallelism"": 2,
                " + "\n" +
                @"    ""retryCount"": 2,
                " + "\n" +
                @"    ""objects"": [
                " + "\n" +
                @"        {
                " + "\n" +
                @"            ""table"": ""TableName""
                " + "\n" +
                @"            
                " + "\n" +
                @"        }
                " + "\n" +
                @"    ]
                " + "\n" +
                @"}";

            HttpClient client = new HttpClient();
            client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", aadService.GetAccessToken());
            try
            {
                var test = await client.PostAsync($"https://api.powerbi.com/v1.0/myorg/groups/{groupid}/datasets/{datasetId}/refreshes",
                                   new StringContent(body, Encoding.UTF8, "application/json"));
            }
            catch (System.Exception)
            {
                throw;
            }

Thanks Ibendlin for your support.