Getting request body from Volley request

I have made request through volley using follwing code -

public <T> void addToRequestQueue(Request<T> req, String tag) {


    req.setRetryPolicy(new DefaultRetryPolicy(
            0,
            0,
            DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

    // set the default tag if tag is empty
    req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
    getRequestQueue().add(req);
}

So I want to get my request body(For eg. input json like {"key","value"}) from 'Request req' parameter of addToRequestQueue method.So is it possible to get it?