{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455978009",
    "entityType": "Track",
    "nonce": "0x51bed7cc8f49c97dc704e8830d074c4c1aac8440686e0bac9d345a84fe6790cb",
    "signature": "0xd17400b72f1c398f1e6db2b973f49e611c373850669484696a1aa8a02d49fcf8478ba8d05a50093bb3be64c7f6a4edcc267bfddbd0aed6132b2adb9495ea47851c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}