{
  "manageEntity": {
    "action": "Save",
    "entityId": "1737384671",
    "entityType": "Track",
    "nonce": "0xeaa178fb41e4dcc0139d7439e407842b20d252909571308351d01509da59f2fc",
    "signature": "0x1774f6e9e200adbb9600bcb3a1a7b5ec18446a965346702808ef0799f254d0bb2a5e8134c6980adc2b5f485be732422f91ebb969a12d43292f48ce319fb577eb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}