{
  "manageEntity": {
    "action": "Save",
    "entityId": "595690",
    "entityType": "Track",
    "nonce": "0x68ad21ffd928118885548cabc5f64e90e2768430fbac668a97c0c2ca8fa065b2",
    "signature": "0x58d3da11c656b707e8a26a6d8ecc71ef1a16732f0f6b7b6af866201925af2b560839e2dc1774ad2a27b4d2fad55356981818d6d219b273bd3091332367cf41181b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}