{
  "title": "AddAppointmentParticipant",
  "type": "object",
  "properties": {
    "@type": {
      "type": "string"
    },
    "user": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "minLength": 1
        },
        "@type": {
          "type": "string",
          "enum": [
            "Worker",
            "ServiceUser"
          ]
        }
      },
      "required": [
        "@id",
        "@type"
      ]
    },
    "host": {
      "type": "boolean",
      "default": "false"
    }
  },
  "required": [
    "@type",
    "user"
  ]
}