client side post method

Hello,

I'am trying to use the Jigsaw client side API. It work fine but I wonder
how to make a post method using the object request in an HttpManager ?
I don't find any method to get an OutputStrean from the request to write on
it.

Please tell me what to do.
Thank's for your help

my code :

request.setURL(new URL(InsNomad[1]));
request.setMethod("POST");

//don't work because I need an OutputStream .
PrintWriter writer = new PrintWriter(request.getOutputStream());
writer.println("URL=http://essai.com&Email=suite@essai.com");
writer.close();

reply   = manager.runRequest(request);
System.out.println("length       : "+reply.getContentLength());