{
  "manageEntity": {
    "action": "Save",
    "entityId": "726481696",
    "entityType": "Track",
    "nonce": "0xd7e477fd35234c555be8b389538ca7d956dc61dbe6db5f5d73e91295e2e86d87",
    "signature": "0xeab4b940241751021f1a2a837bb151c7a86617f1ca31ce1a29052c806d90fa7a3fbb81f0e22b297de8d98aaaf2959c8df9d0dca50012fb07c9e7534f803f510b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}