How to use sed or awk in script to print numbers from line?

I have this line

"sha": "60dede389922f81a64ddb5f30ab6fe8a73deb643",

How to use sed or awk to print only 60dede389922f81a64ddb5f30ab6fe8a73deb643 ?
I have use

awk '/sha/{print $1, $NF}' | sed 's/[^0-9]\{4\}//g'

But I have got wrong vaule

60389922f81a64ddb5f30ab6fe8a73deb643",

>Solution :

What I would do:

awk -F'"' '/^"sha"/{print $4}' file

But I prefer this grep version:

grep -oP '^"sha":\s+"\K[[:xdigit:]]+' file

If the file is JSON, you need jq with something like:

jq -r '.sha' file.json