@janapati10  Oh, too bad, this options for manipulating JSON with Expression Language are - as far as I know - not available before 1.10.0.   When the JSON-format is really stabil maybe this will work for you. UpdateAttribute ==> ${FF_CONTENT:substringBefore('['):append('["'):append(${callid}):append('"]'):append(${FF_CONTENT:substringAfter(']')})}   It is not "elegant" but I haven't got another idea, sorry. ... View more