{
  "manageEntity": {
    "action": "Save",
    "entityId": "496268609",
    "entityType": "Track",
    "nonce": "0x237e04d328a87ecf3929475583930a905d4112bd4d74a1798239bb1ae083346c",
    "signature": "0xdd714d92001f22eaa55fc0930ab4983901926ffa91c7f40287433eaeb48aa29f55555fe7941d78f96224bc6e370356c6d8aaa8adf33a3c52025f50e177856a741b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}