curl --request POST \
  --url https://api.interchange.io/api/v2/storefront/esa/{esaId}/gam/advertisers/ensure \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>"
}
'

{
  "advertiser": {
    "id": "<string>",
    "name": "<string>",
    "status": "<string>",
    "currencyCode": "<string>"
  },
  "created": true,
  "dryRun": true
}