curl --request POST \
--url https://sandbox.killb.app/api/v2/backoffice/legal/downgrade-user \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"level": "<string>",
"userId": "0c4805cf-c97c-4d79-bf7b-4f63a835228e",
"isBlocked": true
}
'