{
  "manageEntity": {
    "action": "Save",
    "entityId": "805176",
    "entityType": "Track",
    "nonce": "0x3e819b9328c5adb7b9bab4699b2c04e5ea0425a7e5dd71116e69a0c7d8597d40",
    "signature": "0xbef3313f25c057633f8c2aa04704b68868cd8494b7aab01594ad378ff3cd884d36236d66d474252284c504d85347581d0887b8053d52f07f028653175f229d491c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}