Retrieving json encrypted data

Retrieving json encrypted data

i got this json encoded data being sent to me. can u tell me how to get
each of the individual elements ? Something like:
$ticket
$customer
$user
{"ticket":{"id":"10909446","number":"152"},"customer":{"id":"3909381","fname":"","lname":"","email":"me@site.com","emails":["me@site.com"]},"user":{"fname":"Test","lname":"Me","id":17396,"role":"admin"}}