API Call

    IEnumerator Post(params string[] suffixes)
    {
        StringBuilder url = new StringBuilder(PLATFORM_URL);
        foreach(string suffix in suffixes)
            url.AppendFormat("/{0}",suffix);
        Log(url+"", "url");

        JsonLeaderboard jsonObj = new JsonLeaderboard
        {
            info = "info"
        };

        string json = JsonUtility.ToJson(jsonObj);

        Log(JsonUtility.ToJson(jsonObj, true), "json");

        byte[] bytes = Encoding.ASCII.GetBytes(JsonUtility.ToJson(jsonObj));

        using (UnityWebRequest www = UnityWebRequest.Post(url+"", ""))
        {
            UploadHandlerRaw uh = new UploadHandlerRaw(bytes);
            {
                www.uploadHandler = uh;
                www.SetRequestHeader("Content-Type", "application/json");
            }

            yield return www.SendWebRequest();

            if (www.isNetworkError || www.isHttpError)
            {
            }
            else
            {
                Log("Completed", "sys");
            }
            Log(www.downloadHandler.text, "sys");
        }
    }