BOX API is not working when CURL used "Grant credentials are invalid"

Hi Team,

I tried to invoke Box api from curl but facing grant access issue

curl -i -X POST "https://api.box.com/oauth2/token" \
     -H "Content-Type: application/x-www-form-urlencoded" \
     -d "client_id=laxwqvlbbb61zkz7oj1np4d2dvsy8fes" \
     -d "client_secret=[xxxxxxxxx]" \
     -d "grant_type=client_credentials" \
     -d "box_subject_type=user"  \
     -d "box_subject_id=24730584636"

Response

{
    "error": "invalid_grant",
    "error_description": "Grant credentials are invalid"
}

Access: App level

Can someone provide the possible solution.