Thankfully, you won’t have to do very much. When the settlement finally goes through, the funds will be deposited into the payment accounts linked to all of the eligible PSN profiles. If you’d like to exclude yourself from the payout, or object to it entirely, you can do so by filing out a written request. That's not necessary unless you have a moral issue with the payout, or you plan to sue Sony about this very same issue later. Accepting the payout now by default means you waive the right to sue Sony for this in the future.