unshared_at returning invalid_parameter with 400

Hi Team,

We are trying to set the unshared_at value to update the publicly shared folder to be accessible for 10 minutes only, with this endpoint, https://developer.box.com/reference/put-folders-id/#param-shared_link-unshared_at

We do have a paid account

However we are getting the below response :

{
    "reason": "invalid_parameter",
    "name": "unshared_at",
    "message": "Invalid value '1712055223'."
}

Could anyone help with this error?