title: Extract value between quotes after colon
body: <p>I would like to extract the value of a parameter, it is separated by a colon and both -parameter and value- are between double quotes.</p>
  
  <p>I tried to do it with awk, but using colon as a separator doesn't work because of the colons you see in the value.</p>
  
  <pre><code>"param1" : "u:user1:A,u:user2:B,u:user3:A,g:group1:A,g:group2:C",
  </code></pre>
  
  <p>I just want to extract this : u:user1:A,u:user2:B,u:user3:A,g:group1:A,g:group2:C, in order to append a new value at the end with my script.</p>
  
  <p>Thanks</p>