Receive a signed Greenhouse webhook

curl --request POST \
  --url https://api.join.tl/api/apps/greenhouse/v1/webhook/{installationId} \
  --header 'Content-Type: application/json' \
  --header 'Greenhouse-Event-ID: <greenhouse-event-id>' \
  --header 'Signature: <api-key>' \
  --data '
{
  "action": "application_updated",
  "payload": {
    "application": {
      "candidate": {
        "email_addresses": [
          {
            "type": "work",
            "value": "ada@example.test"
          }
        ],
        "first_name": "Ada",
        "id": 20001,
        "last_name": "Example",
        "photo_url": "https://example.com/images/ada.png",
        "url": "https://example.com/candidates/20001"
      },
      "current_stage": {
        "id": 40001,
        "name": "Jointl Review"
      },
      "id": 10001,
      "jobs": [
        {
          "id": 30001
        }
      ],
      "prospect": false,
      "status": "active"
    }
  }
}
'