[
  {
    "id" : "int-1",
    "type" : "ClutterInterval",
    "value-type" : "gfloat",
    "initial" : 23.3,
    "final" : 42.2
  },
  {
    "id" : "int-2",
    "type" : "ClutterInterval",
    "value-type" : "ClutterColor",
    "initial" : "red",
    "final" : "blue"
  }
]