{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": ["object", "null"],
  "additionalProperties": false,
  "required": ["id", "guests"],
  "properties": {
    "id": { "type": "string" },
    "guests": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["user_id"],
        "properties": {
          "user_id": { "type": "string" },
          "user_display_name": { "type": ["string", "null"] },
          "slot_id": { "type": ["string", "null"] },
          "is_live": { "type": ["boolean", "null"] }
        }
      }
    }
  }
}