curl --request POST \
  --url https://hub.griff.services/notifications/test \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "integration": "<string>",
  "routing": {
    "channelType": "slack",
    "channel": "<string>"
  }
}
'

{
  "data": {
    "success": true,
    "message": "<string>"
  }
}