generate-data.js

var fs = require('fs');
var jay   = JSON.parse(fs.readFileSync('jay.json', 'utf8'));
var robin = JSON.parse(fs.readFileSync('robin.json', 'utf8'));
var smile = JSON.parse(fs.readFileSync('smile.json', 'utf8'));

var data = { "jay": { "tags": jay.meta.frameTags,
                      "layers": jay.meta.layers },
             "robin": { "tags": robin.meta.frameTags,
                        "layers": robin.meta.layers },
             "smile": { "tags": smile.meta.frameTags,
                        "layers": smile.meta.layers } };

fs.writeFileSync('output-data.json', JSON.stringify(data));

output-data.json

{
  "smile": {
    "layers": [
      {
        "blendMode": "normal",
        "opacity": 255,
        "name": "Background"
      }
    ],
    "tags": [
      {
        "direction": "forward",
        "to": 1,
        "from": 0,
        "name": "Smile"
      },
      {
        "direction": "forward",
        "to": 5,
        "from": 2,
        "name": "Run"
      }
    ]
  },
  "robin": {
    "layers": [
      {
        "blendMode": "normal",
        "opacity": 255,
        "name": "Background"
      }
    ],
    "tags": [
      {
        "direction": "forward",
        "to": 1,
        "from": 0,
        "name": "Smile"
      },
      {
        "direction": "forward",
        "to": 5,
        "from": 2,
        "name": "Run"
      }
    ]
  },
  "jay": {
    "layers": [
      {
        "blendMode": "normal",
        "opacity": 255,
        "name": "Background"
      }
    ],
    "tags": [
      {
        "direction": "forward",
        "to": 1,
        "from": 0,
        "name": "Smile"
      },
      {
        "direction": "forward",
        "to": 5,
        "from": 2,
        "name": "Run"
      }
    ]
  }
}