{
  "manageEntity": {
    "action": "Save",
    "entityId": "734216998",
    "entityType": "Track",
    "nonce": "0x818af1c44caf99af2f164327603ee70d16dcc04f4a40fcbdb7d568dcaebba958",
    "signature": "0x20b0ec168ab24e422a600141435d2cbef1ff53cb7085ad64945787300521a03a716e20e7970516b1b9bed18ebd073d90491940ef7b4ffd2a63f7b402bb260c801c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}