{
  "$schema": "https://www.atsc-schemas.org/atsc3.0/a344/20260218/org.atsc.CacheRequest-request.json",
    "jsonrpc": "2.0",
    "method": "org.atsc.CacheRequest",
    "params": {
      "targetURL": "images/",
      "URLs":["A/big-image1.png", "B/big-image2.png"]
    },
    "id": 38
  }