title: Can't verify CSRF token authenticity in rails
body: <p>I am using PaypalAdaptive. It sends ipn_notification properly. ipnNotification action method is as following - </p>
  
  <pre><code>def ipn_notification
      ipn = PaypalAdaptive::IpnNotification.new
      ipn.send_back(request.raw_post.to_json)
  
      print "=====================request.raw_post#{request.raw_post}=============="
  
      if ipn.verified?
          PaymentMailer.notify_unknown(request.raw_post).deliver
      else
          logger.info "IT DIDNT WORK"
      end
      render :nothing =&gt; true
  end
  </code></pre>
  
  <p>but it's returning error </p>
  
  <pre><code>WARNING: Can't verify CSRF token authenticity rails
  </code></pre>
  
  <p>Any help for this problem.</p>