How to update signature.json to pass integrity check

Using Nextcloud 20.0.1 docker image.
Failing integrity check because I modified .htacces, everything else is working great.

1.) I updated two rules in .htaccess.
2.) Ran occ maintenance:update:htaccess and occ integrity:check-core which showed incorrect hash.
3.) I then used sed to replace the old htaccess hash with the new one in signature.json
That produced this error

- core
		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
		- Signature could not get verified.

Question is:
How do you modify core configuration files and properly update the signature.json file.