I am not sure how it can be done.

What I am trying to do is.

I have a Paypal subscription form.

when a user clicks on Subscribe, An Ajax call is made to Paypal API and an authorization token is obtained.

Now I want to redirect the user/customer to Paypal after the token is received to complete the subscription with the authorization token.

Now my question is I can make the ajax call and get the response,

But after that how I can redirect the customer to paypal alongwith urlencoded-data is the question.

Update

The second request will be like this which should redirect to Paypal at the same time.

https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=InsertTokenHere