{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896897129",
    "entityType": "Track",
    "nonce": "0x30890ff2fe90ba567c65a5748c37e76e6c4c15ffae6d8fbda8e3ed90d77f932e",
    "signature": "0xf6fec25266abdd820b2cdfc02fc905c4988102b6461ba6cb839810665e1a68d95124d3a39c2adecb4b2b9afb308c0cac862ba62673a5387bb164b972ba9ec2101c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}