{
  "manageEntity": {
    "action": "Save",
    "entityId": "842098319",
    "entityType": "Track",
    "nonce": "0xe61b8989d19c375f5e9b2b675e5c1f330d6c5c2c19dc82425a87b33041474f95",
    "signature": "0xd2d9e6982f80b51a60e1821c71d8ff07de318d3cb30230a84de65808228947de412cfa4ea870d1df353a0daef33584beea197f29f03962e059dde7a9a9bc24391c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}