curl --request POST \
  --url https://api.example.com/api/v1/events/ingest \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "events": [
    {
      "code": "<string>",
      "customer_id": "<string>",
      "event_id": "<string>",
      "timestamp": "<string>",
      "properties": {}
    }
  ],
  "allow_backfilling": true
}
'

{
  "failures": [
    {
      "event_id": "<string>",
      "reason": "<string>"
    }
  ]
}