Validation for requests is not working

The request looks like this

curl -i -X PUT \
   -H "Authorization:Bearer <token>" \
   -H "data-partition-id:osdu" \
   -H "Content-Type:application/json" \
   -d \
'{
  "datasetRegistries": [
  ]
}' \
 'https://<server>/api/dataset/v1/registerDataset'

returns only the HTTPS status 400 with empty body