{
  "manageEntity": {
    "action": "Save",
    "entityId": "975106364",
    "entityType": "Track",
    "nonce": "0xa8a72c2abba66e3369583cf0749f843121eb856f9ce1de85f2308fd559221e7c",
    "signature": "0x42d472797658d6eb67c819c0b3a77d33a1df0e9d714149ddcd43949b4604ff1176dd9582a608b5d5708f36e8f14d0a4ac2aae843360aedc82d0763fa87a723fb1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}