{
  "manageEntity": {
    "action": "Save",
    "entityId": "516394289",
    "entityType": "Track",
    "nonce": "0x675decc53e8e7c7d4078b296720036beb263d161ec2293454cb7bac1a9b1c054",
    "signature": "0x253dbbf7bb1ee64a5d988733b18635396bb073172bbe0c2ed44944d91c69a2795a739a3551b8cf7fee7a131c9d1581dded705e57603f8f1530199872aec30bad1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}