{
  "manageEntity": {
    "action": "Save",
    "entityId": "655753050",
    "entityType": "Track",
    "nonce": "0xc8437810fe83be0dacd40e1a88d03d796e18dab7d6af898fd8b90cb67c906690",
    "signature": "0x8fc37d1f4e993a10fa9fd52f2017063d96b6f654f6f3ab8a3a96d38cd8617245320d87531357f6b7bcfe168a1f855ae2615237fde8800ed3c49506ad041225791b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}