public static String generateSignedURL(String method, Map<String, String> params) {
        StringBuilder builder = new StringBuilder(LightApp.getInstance().getApi().generateMethodString(method));
        if (params != null) {
            for (Map.Entry<String, String> entry : params.entrySet()) {
                builder.append(String.format("&%s=%s", entry.getKey(), entry.getValue()));
            }
        }
        if (LightApp.getInstance().isDebug())
            Log.d(LightApp.TAG, "Make GET request: " + builder.toString());
        return builder.toString();
    }