User URL paramerter as the value for a field inside the request body

[Alwyn2000]

Hello,
If I have PUT request and request body like below, if I want to set the id in request body same as the id in URL, what should I do? Can I use something like

id: 'request.query.id' ??

URL:
PUT http://localhost/api/v1/update/student/{id}
Request Body
{
"id": null,
"name": "string"
"age" : "string"
}