curl --request POST \
  --url https://api.sftpsync.io/schemas/{schemaId}/validate \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "data": {}
}'

{
  "valid": true,
  "errors": [
    {
      "field": "<string>",
      "message": "<string>"
    }
  ]
}