{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459892721",
    "entityType": "Track",
    "nonce": "0x99b02cd9c6e4ea3333c7e4984052ca436d85f258d8b76308845fda0b00e0ccff",
    "signature": "0xa59dbf6497be2c852977bc6757593757161fa43bbf9736f3217621653aa4d13d6b555c1eee6dec73c2658c76dec0d1fd20e15dfec012603e84c45e0fd43b5cc51b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}