{
  "manageEntity": {
    "action": "Save",
    "entityId": "1472219827",
    "entityType": "Track",
    "nonce": "0x7bbd77cf952792ea5eda1d12822a173bd409c816578fe2d0c0a61041ba1f5062",
    "signature": "0xa0efc794f0eb6667a9ca1a671373d37e002ab5e9a04a6b40dae918efc44150e63288017f124d7c3d919420bc6eaeb74fc2c90a868de9126f2429ee54f82c21651c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}