{
  "manageEntity": {
    "action": "Save",
    "entityId": "1668776523",
    "entityType": "Track",
    "nonce": "0xefae80d67b1687567e2ee35cfbc0684f6c2a6520cca38edd5508af7484596deb",
    "signature": "0x4def0080c1d2520834f1ab406045f44939c733b4753fad554d2e8796222249683a69bc3def5702a350710a1ab62ad0b88241277bd8526dcdf7931e26aa8126341c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}