I am trying to monitor uac channels status periodically in kamailio config file.

I call  uac.reg_dump  rpc command and result will be inside in   $var(uac_channel) variable

 jsonrpc_exec('{"jsonrpc": "2.0", "method": "uac.reg_dump"}');

$var(uac_channel) = $jsonrpl(body);

it returns me json formatted result like below, it has a several channels info and their status flags

{"jsonrpc":"2.0", "result":[ 

{"l_uuid":"YY","l_username":"YY","l_domain":"YY","r_username":"YY",".,  "flags":16   },
{"l_uuid":"XX","l_username":"XX","l_domain":"XX","r_username":"XX",,... "flags":1 }}]}

I could not parse this result on kamailio.cfg file ! I want to learn channel that has a 16 value in flag attribute for example !!

Would you help me to figure out how I am gonna parse this json file please ?