{
  "manageEntity": {
    "action": "Save",
    "entityId": "1140114553",
    "entityType": "Track",
    "nonce": "0xe4e2be2e630eb10c7164b40a645294cc949e58a8602349a4c0dcd071c7b50d75",
    "signature": "0x25dea77cb64e409cae2285e97cff8d0ba91617ae3656a39351656b27579cdeef0afbe1a2b3c91bde1b905965314a4d283da9acb5a1ab45bacfc9e5e2212216371b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}