{
  "manageEntity": {
    "action": "Save",
    "entityId": "1208973318",
    "entityType": "Track",
    "nonce": "0xf7f569c46edd751f37e9077a3543f7621b6e40d7dc89faff19f4fc5c8049a66f",
    "signature": "0x4f37cc783650ca3cb407d2f7e4ac135c38bc73fd973408b4b477cc709abe78015e07499070f7f0d7f66538e3c11db907da6ad0f792a974811c54945654e269ba1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}