title: how to push blob storage events to event grid topic
body: <p>I'm getting the following error when I attempt to create an event subscription for <code>blobCreated</code>:</p>
  
  <p><a href="https://i.stack.imgur.com/Hkxl3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Hkxl3.png" alt="enter image description here"></a></p>
  
  <p>When there is a new blob in a container, I'd like that event to be forwarded to a topic.</p>
  
  <p>I went to the storage account, and attempted to create an event subscription:</p>
  
  <p><a href="https://i.stack.imgur.com/xqLUM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xqLUM.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/kufe8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kufe8.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/cIRRY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cIRRY.png" alt="enter image description here"></a></p>
  
  <p><strong>What am I doing wrong? How do we push blob storage events to an event grid topic?</strong></p>