{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054172405",
    "entityType": "Track",
    "nonce": "0x9f9b4e90affc1d6ad04acbb95ae57e8402c6dc35ce58c61c32ef3ceaeab8c278",
    "signature": "0x14a111c056b50b8aea8f4ea7f9cb5b005366b159e2b341491d5c085ec5a6de94373e9cb5c1f6301050324bee798a1e3ddbda4c66140d4617ad06195a041375091b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}