{
  "manageEntity": {
    "action": "Save",
    "entityId": "1652906529",
    "entityType": "Track",
    "nonce": "0x3dde0d6101620d899b1ae065fbf40d42b30aa97178a7a49950b918d227768909",
    "signature": "0x10ceca61e19abb7dfe1c835d9542a15b7e297e299aece06c8a28cde347a622bc1c3f407e879bd94b54e278609c0831caa99882d3226cb7de3874c735adf1b5591c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}