{
  "manageEntity": {
    "action": "Save",
    "entityId": "809564",
    "entityType": "Track",
    "nonce": "0x2e60ef3a77278820df462c0e27e7b1e0edcc06b762f91ae4f58f8df65f64280f",
    "signature": "0xadacf040720ff9bd9aff0efa89e1dd8146dd8a7fe7a494b9a457c1f93287b0732cb5a994a670c2e57bbfa6fe58f1daeece35854bccde1c09077374a4b8545f081c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}