Add json format option in playlist create (#2106)
Add json format option in playlist create (#2106)

* Add json format option in playlist create

* Add json error cases

avalonmediasystem/avalon,avalonmediasystem/avalon,avalonmediasystem/avalon,uvalib/avalon,uvalib/avalon,nulib/avalon,ualbertalib/avalon,nulib/avalon,nulib/avalon,avalonmediasystem/avalon,ualbertalib/avalon,ualbertalib/avalon,uvalib/avalon,nulib/avalon,uvalib/avalon,ualbertalib/avalon