{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique user identifier (UUID)"
    },
    "name": {
      "type": "string",
      "description": "Full name of the user"
    },
    "email": {
      "type": "string",
      "format": "email",
      "description": "Valid email address"
    },
    "age": {
      "type": "number",
      "minimum": 18,
      "maximum": 100,
      "description": "User age between 18 and 100"
    },
    "role": {
      "type": "string",
      "enum": ["admin", "user", "moderator"],
      "description": "User role in the system"
    },
    "active": {
      "type": "boolean",
      "description": "Whether the user account is active"
    },
    "registeredAt": {
      "type": "string",
      "format": "date-time",
      "description": "ISO 8601 timestamp of registration"
    }
  },
  "required": ["id", "name", "email"]
}