curl --request POST \
  --url https://api.plec-it.com/cart/add \
  --header 'Content-Type: application/json' \
  --data '
{
  "listingId": "10000001",
  "listingTitle": "Downtown Event Space",
  "startTime": "2025-12-04T09:00:00.000Z",
  "endTime": "2025-12-04T13:00:00.000Z",
  "guestCount": 10,
  "selectedPackages": [
    {
      "packageId": "pkg-premium",
      "packageName": "Premium tier",
      "price": 100
    }
  ],
  "skipBaseRate": true,
  "imageUrl": "<string>"
}
'

{
  "success": true
}