{
  "manageEntity": {
    "action": "Save",
    "entityId": "584948360",
    "entityType": "Track",
    "nonce": "0x913e5b2b6fe7244c114b07f2e9a6f29b611c88996ad2e917efe7a7b1420b9e94",
    "signature": "0x9a9348353ab57057233bcd5ea6da64938b473271498d6ceb25c90ac7bd6038c42f85b726b82787d40663e1d65b3737434c6156987878e6f40312b3652ebcdba61b",
    "signer": "0x780028415E21688FAA8A7552D03fC4aFf55A839F",
    "userId": "10817"
  }
}