{
  "manageEntity": {
    "action": "Save",
    "entityId": "536872890",
    "entityType": "Track",
    "nonce": "0x4d355f721e0eb0adfb6b8e9fb22c83c51fcacab91188a6980851e4049d517fd7",
    "signature": "0xadf3fa0a9ef7eb6746f69c5551473cd7fdb1a746f554f4bccbd8b956d2254b3d2ea3997ef6c847883d57c0a710c401216fd749b53d376fbf8f7f57aeeae0b8a91b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}