How to send push notifications for coupon in wallet/passbook?

Question

Python

All the best! Maybe someone faced push back to their coupon in wallet? Tell me how to implement this, or maybe there is some intelligible manual?
For the test, I tried to send a push through the Pusher utility, he ate a certificate from passbok, connected somewhere (status connected), the token indicated the one that was set in authenticationToken when generating the coupon, but I don’t even understand what to enter in Payload ...