{
  "comments": {
    "new": "ISBN: 1-884678-51-3",
    "old": "ISBN: 1-884678-51-3\n\nMCN unverified"
  },
  "error_count": {
    "new": "0"
  },
  "legacy": {
    "cdtext_catalog": {
      "new": "0000000000000"
    }
  }
}