What command do I need to use to scroll down my content in a web page?

In my web page I have a scroll bar in order to scroll down the content, but in my automatization test I can’t do it.
At the bottom of the page I have some action button

You can do a “CLICK…” on an element at the bottom of the page. Then UI.Vision will scroll down. Example: This macro clicks on a word in the footer of Techcrunch.com => UIV scrolls down:

{
  "Name": "tc",
  "CreationDate": "2019-7-29",
  "Commands": [
    {
      "Command": "open",
      "Target": "https://techcrunch.com/",
      "Value": ""
    },
    {
      "Command": "click",
      "Target": "xpath=//*[@id=\"root\"]/div/div/footer/div/p/span[2]",
      "Value": ""
    }
  ]
}