{
  "resourceType": "Subscription",
  "status": "active",
  "reason": "Notify external system on new Observation",
  "criteria": "Observation?status=final",
  "channel": {
    "type": "rest-hook",
    "endpoint": "https://example.org/medplum/webhook",
    "payload": "application/fhir+json",
    "header": [
      "Authorization: Bearer REDACTED"
    ]
  },
  "end": "2027-01-01T00:00:00Z"
}