{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559945510",
    "entityType": "Track",
    "nonce": "0xee758209fe842c5b22562428867c0236f57581367b42912bb9abb92ae80bcccf",
    "signature": "0x17ac30c30e84736578a3f29444c7f4605ef32210a9efafb71f52e20764b0a11752128d22e4d0ebe436c72c8bb7bebdc02194a27220a6e70e954426d9bb0aa8071c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}