nostr:npub18ams6ewn5aj2n3wt2qawzglx9mr4nzksxhvrdc4gzrecw7n5tvjqctp424 will you please hop onto nostrnest, beehive, or cornychat and explain to me how to implement Nip-07? I'll gladly pay sats. I'm 98% done with NostrKeyring browser extension and ready to produce it but can't get signEvent to work.