{
  "manageEntity": {
    "action": "Save",
    "entityId": "386614520",
    "entityType": "Track",
    "nonce": "0xf4f0e0c0bffb62d9b5ed11de84bf2bcecbac98678b37df243f88ece223a35ef0",
    "signature": "0x8bf667a579861b80f4ebaf6a1cd05157e33a4951d7dbb5785c014137e77dfab82463684041e8af7d04d9fd0b1de0c6ccfff7a671e9a6c7f9be8836f1314986641b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}