Verify & update if needed the nonce logic

[LoznianuAnamaria]

We've refactored the user nonce logic in the provider code via this PR: oceanprotocol/provider#649 due to various bugs we were facing(like the invalid signature bug).
In the ocean.js we already have a PR: oceanprotocol/ocean.js#1747 to integrate these changes.
I understand that this shouldn't be a breaking change for ocean.py but we still need to make sure things are still working as expected.
cc @calina-c @trentmc