{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "button",
  "customRowAction": {
    "action": "embed",
    "actionInput": {
      "src": "='YOUR_FLOW_HTTP_URL_HERE' + '&ID=' + [$ID] + '&User=' + @me",
      "height": "100",
      "width": "250"
    }
  },
  "style": {
    "border": "none",
    "background-color": "#0078d4",
    "color": "white",
    "cursor": "pointer",
    "padding": "6px 12px",
    "border-radius": "4px",
    "font-weight": "600"
  },
  "children": [
    {
      "elmType": "span",
      "txtContent": "Trigger Action"
    }
  ]
}