{
  "manageEntity": {
    "action": "Save",
    "entityId": "1852830538",
    "entityType": "Track",
    "nonce": "0x30862034f1821a77d811af6a58af793e7db4169819b46bdd59c6e60a4a3921e4",
    "signature": "0x2bc9afcb60fdaea5ab11c63bde23d89f569bef7b2d74a4eff22b363f7bc2e91e679316e99d14f97824acf0ca39a136814440222541bc58723ff75fc2fa25941d1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}