How to manage IP's of subnets with ipv6 prefix delegation?

I have a dynamic prefix /56 assigned and i want to assign IP’s and create subnets on several bridges so they look like this:

interface=bridge1
Subnet=xxxx:xxxx:xxxx:xx01::/64
IP=xxxx:xxxx:xxxx:xx01::1/64

interface=bridge2
Subnet=xxxx:xxxx:xxxx:xx02::/64
IP=xxxx:xxxx:xxxx:xx02::1/64

interface=bridge15
Subnet=xxxx:xxxx:xxxx:xx15::/64
IP=xxxx:xxxx:xxxx:xx15::1/64

I’m confused, I can not find a way to do it. Any ideas?