example/merge.json

{ "target": "theta0",
  "source": [
      "theta0",
      "theta1",
      "theta2",
    {"family": "theta",
     "data":  "AgMDAAAazJMFAAAAAACAP_s4eYkTJI8BbakWvEpmYR4jpVs4Gv10Hz663KNvb7YgVx7EnK9Blzo\u003d" }
  ]
}