curl --request PATCH \
  --url https://api.passentry.com/api/v1/batches/{id}/cancel \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "8ecfc493-da04-493b-8b98-bf9d5cc29114",
    "type": "walletMessaging",
    "attributes": {
      "name": "Summer Promotion",
      "status": "cancelled",
      "tag": null,
      "content": "Hello, World!",
      "scheduledAt": "2030-03-31T13:16:26Z"
    }
  }
}