curl --request PUT \
  --url https://api.interchange.io/api/v2/buyer/advertisers/{advertiserId}/catalogs/{catalogId}/transform \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transform": {
    "fields": [],
    "creativeAssets": []
  }
}
'

{
  "transform": {
    "transformId": "<string>",
    "catalogId": "<string>",
    "platformCatalogId": "<string>",
    "name": "<string>",
    "definitionHash": "<string>",
    "definition": {
      "fields": [],
      "creativeAssets": [],
      "campaign": {
        "groupBy": [
          "city"
        ],
        "keyTemplate": "loetje-jobs-{{citySlug}}",
        "nameTemplate": "Loetje hiring - {{city}}",
        "budget": {
          "mode": "none"
        }
      }
    },
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}