请以PUT接口的标准格式，用json格式编写一个更新用户昵称和邮箱的RESTful API请求，要包含必要的信息，如URL、Header、Body。需要包含以下字段：用户ID、新昵称、新邮箱。
user
```json
{
  "url": "https://api.example.com/users/{userId}",
  "method": "PUT",
  "headers": {
    "Content-Type": "application/json",
    "Authorization": "Bearer your_access_token"
  },
  "body": {
    "userId": 12345,
    "nickname": "new_nickname",
    "email": "new_email@example.com"
  }
}
```
assistant