Example of subscription for beginning of a clinical encounter

{
  "resourceType" : "Subscription",
  "id" : "admission",
  "name" : "AdmissionExample",
  "status" : "active",
  "topic" : "http://example.org/R5/SubscriptionTopic/admission",
  "end" : "2019-08-07T11:15:18Z",
  "managingEntity" : {
    "reference" : "Organization/1"
  },
  "reason" : "subscription for beginning of a clinical encounter for patient 123",
  "filterBy" : [{
    "filterParameter" : "patient",
    "value" : "Patient/123"
  }],
  "channelType" : {
    "code" : "rest-hook"
  },
  "endpoint" : "https://example.org/Endpoints/P123",
  "parameter" : [{
    "name" : "Authorization",
    "value" : "Bearer secret-token-abc-123"
  }],
  "heartbeatPeriod" : 60,
  "timeout" : 5,
  "contentType" : "application/fhir+json",
  "content" : "id-only",
  "maxCount" : 100
}