{
  "manageEntity": {
    "action": "Save",
    "entityId": "168447783",
    "entityType": "Track",
    "nonce": "0x1dbe14c95b84377db3aaaae8fe263e93bc29aa4720102ca8029615023562d5e0",
    "signature": "0x205730aad2c5170519b15ad91968de75f34ae6d8daec8cdeaea56922646aeba06912fef06fd4e76c6b296d4cdee295dcf498cbbbab01a14075eacc3a998134b11c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}