Can I set the ObjectId in Backendless myself

I use Parse.com for storing my data but since they will shut down their service I am going to use Backendless in the future.

I use it in my Android app for storing data and syncing it between devices. Since the app can work offline I will use a SQLite DB to store the data and sync it to Backendless when online. And new data from Backendless will be stored in the SQLite DB as well to be available when working offline.

So when offline and creating a new record, I have to store it in SQLite until being online again. Now can I set the ObjectId, which is the identifier of Backendless objects, myself and will Backendless still get that is has not been saved to the cloud even already having an ObjectId set?