Revert "detalles de validacion y diseño en upload_creatives"

This reverts commit 0ac18e5a23d379052fd82767a783ec714700bfb1.
Revert "Revert "detalles de validacion y diseño en upload_creatives""

This reverts commit dcd6135775a3a62894b1867600bff509142634d1.