curl --request POST \
  --url https://api.courier.com/bulk \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "message": {
    "template": "<string>",
    "brand": "<string>",
    "data": {},
    "event": "<string>",
    "locale": {},
    "override": {}
  }
}'

{
  "jobId": "<string>"
}