SHELL

create json from console

$ jo time=$(date +%s) dir=$HOME
{"time":1457195712,"dir":"/Users/jpm"}

create json from console

$ jo -p name=JP object=$(jo fruit=Orange point=$(jo x=10 y=20) number=17) sunday=false
{
   "name": "JP",
   "object": {
      "fruit": "Orange",
      "point": {
         "x": 10,
         "y": 20
      },
      "number": 17
   },
   "sunday": false
}