How to run command for a block component?

editor.BlockManager.add('test', {
      label: 'test',
      category: 'Basic',
      command: () => {
        editor.runCommand('open-assets')
       }
    });

I'd like to do something like this. so once a user drops the test component into the canvas, I'd like to open up asset manager modal where you can upload an image by running 'open-assets' command.

Thank you very much Artur