How to Send Messages to Selenium IDE

[radiantone]

Hello,
I want to send messages to SIDE using chrome.runtime.sendMessage per the docs. However, the docs do not expand on all the available uri resource paths to perform actions.

I tried sending this message (I have a version of the extension locally so the id is different).

chrome.runtime.sendMessage('injldmpklnapoapkkjjhongmhknknpdo',
{
      "uri": "/playback/command",
      "verb": "post",
      "payload": {
        "command": "open",
        "target": "https://www.google.com", 
        "value": "" 
      }
    }
  request.message
    )

But it doesn't work. The request completes successfully tho. What am I missing? Thank you!