"organizerCalendarAddress": "mailto:organizer@example.com",
"participants": {
  "251d3e9f-d83f-534c-8c45-c2896c75670c": {
    "@type": "Participant",
    "calendarAddress": "mailto:organizer@example.com",
    "name": "Jane Doe",
    "roles": {
      "owner": true
    }
  },
  "59eb121c-e8f2-558a-9049-ef750a5976bd": {
    "@type": "Participant",
    "calendarAddress": "mailto:foo@example.com",
    "expectReply": true,
    "roles": {
      "owner": true
    },
    "...": ""
  }
}