TestrailApi json檔post傳送,我想要用json檔call api,現在json是寫死的,可是我想要的是json檔是傳進來的應該如何改寫??

class UpdateTestResultsToTestRail
    {
        static void Main(string[] args)
        {
            APIClient client = new APIClient("https://hp-testrail.external.hp.com/");
            client.User = "nick.lee@hp.com";
            client.Password = "k6jSBqaXP2YT6G.YJbib-SuzVeNlWPJ0MEP0Uxem";
            var data = new Dictionary<string, object>
            {
                { "status_id", 1 },
            { "comment", "Autumation!" }
            };

            JObject r = (JObject)client.SendPost("add_result/485353165", data);
            Console.WriteLine(r);
            Console.ReadKey();
        }

    }