{
  "manageEntity": {
    "action": "Save",
    "entityId": "298199087",
    "entityType": "Track",
    "nonce": "0x20fb94d70aed0bf613ac399f3cfd859150ddf247d1c9952c879a634d4f828854",
    "signature": "0xf72283b8255609f0c1847a7fcec87d05e4a652261113da72b85dce05b4196e762626bdacfed4bf1f5200bd9f97516df2e9ee498216c0a04e7214161781edf2881c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}