{
  "manageEntity": {
    "action": "Save",
    "entityId": "538766",
    "entityType": "Track",
    "nonce": "0xbfe6d09a21b4a1c6580429c55b865c1811d76299f8b778f297092c8c48b85c74",
    "signature": "0xd35b41d035023a5d9188f55c1d302644a1da4e31bf92ab817a4b909b59450d8573e6c414f4b47e4906d9e14330acdb340f4faa17f432165f5717ecdc1989ea0c1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}