--base64 & json which parameter inside

[random-robbie]

Is your feature request related to a problem? Please describe.
I have a url like kubernetes.docker.internal/?hash=eyJtZXNzYWdlX2lkIjoiNSIsImNhbXBhaWduX2lkIjoiMTMiLCJjb250YWN0X2lkIjoiNSIsImVtYWlsIjoiMkAyLmNvbSIsImd1aWQiOiJvc3d1cWItdnJqdWRvLXBkZnpxZy1zdWF3Zm4tZmJvbHNhIiwibGlzdF9pZHMiOiIiLCJhY3Rpb24iOiJ1bnN1YnNjcmliZSJ9

Inside the base64 string is {"message_id":"5","campaign_id":"13","contact_id":"5","email":"2@2.com","guid":"oswuqb-vrjudo-pdfzqg-suawfn-fbolsa","list_ids":"","action":"unsubscribe"}

Describe the solution you'd like
I'd like to be able to tell it inside the base64 string i want to inject in to the list_ids

Describe alternatives you've considered
None