1. Add this method to `NotificationsCryptoModule.cpp`: https://gist.github.com/marcinwasowicz/f81464d953894bb65f7fd0a891f7def8
2. Call it inn NSE before decryption and after decryption. In both cases log the result.
3. Send two notifications.
4. Examine console logs from NSE.
5. Ensure that the second pretty print of olm file for the first notification is the same as the first pretty print for the second notification. This will ensure that the file was indeed updated.