{
  "manageEntity": {
    "action": "Save",
    "entityId": "1560591832",
    "entityType": "Track",
    "nonce": "1787516425443333634",
    "signature": "0xaf1f97ede95d0b49c7b4dde937ce79d492343834d4620f5b6f40d63479ad0957597a0e629e080f13ead31ff2e34afadc8530e7cec02b217c6b57b08a2451fb1a1c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}