title: What are Channel and Signature in the Push API?
body: <p>In reference to <a href="https://www.pubnub.com/http-rest-push-api/" rel="nofollow noreferrer">HTTP REST Push API</a>, my assumption is that I can literally replace the "Publish Test" URL (<a href="http://pubsub.pubnub.com/publish/demo/demo/0/hello_world/0/%22Hello%20World%22" rel="nofollow noreferrer">http://pubsub.pubnub.com/publish/demo/demo/0/hello_world/0/%22Hello%20World%22</a>) with data from one of my pubnub apps and put it in a browser.  I did this, replacing the "demo" strings with my pub and sub keys.  I got a JSON response of "Sent" with a unique ID.  However, when I look at the demo keyset that I used in my account, it says "0 messages".  </p>
  
  <ol>
  <li>What are Channel and Signature (0's in the URL above)? Do I need them? Where do I get them?</li>
  <li>Would the above test register a message count in my demo key?</li>
  </ol>
  
  <p><a href="https://i.stack.imgur.com/DKqES.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DKqES.png" alt="enter image description here"></a></p>