/// <summary>POST request with body of "x-www-form-urlencoded" type to the api that responses in JSON</summary>
/// <param name="url">String with url for POST request</param>
/// <param name="postRequestBody">Body of POST request that will be serialized to "application/x-www-form-urlencoded" media type</param>
/// <returns>Object of given generic type with response data</returns>
public static T PostAsUrlEncodedWithJsonResponse<T>(string url, IEnumerable<KeyValuePair<string, string>> postRequestBody)
{
    using (var client = new HttpClient())
    {
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        HttpResponseMessage response = client.PostAsync(url, new FormUrlEncodedContent(postRequestBody)).Result;
        if (response.IsSuccessStatusCode)
        {
            response.Content.Headers.ContentType.MediaType = "application/json";
            return response.Content.ReadAsAsync<T>().Result;
        }
        else
            throw new HttpRequestException(string.Format("Error in {0} with params url: {1} and body: {2} ", MethodBase.GetCurrentMethod().Name, url, postRequestBody.ToString()));
    }
}