Not in an easy manner. You need the csv export and the Excel import functionality for that, or create a webservice for this. If you have a lot of entities this can take quite some time because you need to create datagrids that showes all the data (including the references to other entities) so you can then export those overviews with the csv export button. Then in the cloud use the Excel importer module to read all the data back again.
You might also want to check out this module in the appstore (csvservices): https://marketplace.mendix.com/link/component/1911