How to extract this text from saved html source

[n3txpr1ng]

How to extract this text from saved html, the desired text is highlighted in green

"dtsg_ag":{"token":"AQyhsl2aifqSJ4SfYewLsRQTm8vO646e0JBLQd9N3z7PhR4v:27:1657573672","valid_for":604800,"expire":1660662721}

[GaG]

1. It is in json notation, so you could use json path
2. You can use regex to extract desired text
3. You can use built in BAS action "Get substring between" >
   Left substring

"token":"

Right substring

","valid_for"