{
  "manageEntity": {
    "action": "Save",
    "entityId": "861253009",
    "entityType": "Track",
    "nonce": "0x150c424899da2c6fc8bb3ffd26796c447c50c1b9b157235c518e793db660717b",
    "signature": "0x52f863dbfd6c18f2caf600a61cd5f59b3f25237800febb852f6b40c2d9eba44d7633f5b936c8dd2c98f44fe13613c2897d33c48c4af81e38a6dc1f06ff1a8f1f1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}