{
  "comments": {
    "new": "ISBN: 0-87177-442-9",
    "old": "Lack of pregaps should be confirmed"
  },
  "error_count": {
    "new": "1"
  },
  "ring_codes": {
    "new": "PSRM-005130\t2 IFPI L330 IFPI 5100"
  }
}