{
  "manageEntity": {
    "action": "Save",
    "entityId": "896554828",
    "entityType": "Track",
    "nonce": "0x7901e7b9831b8a5a2bf9170c9d7f925d5f28fdb43166b9c774dacb20d3992c32",
    "signature": "0x3cb1110b22b4bd259d22b7a6fd956f9bf99dacc147d7937876852daae98097875603330be4bd81e8d7c6e3002b4ebafa624c20febb8f4a45e5ca9080c0e8c81b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}