{
  "manageEntity": {
    "action": "Save",
    "entityId": "1305992359",
    "entityType": "Track",
    "nonce": "0xd82e9f43cca5adc012881e88f535d1501f14bf82b3db7a965120e93b2a073d8c",
    "signature": "0xa50a99cf65b1d489b6c0d5bb37005c35212d73a7843701a2142e617df1dc637c13f8c5a3470f5067a9618627fdf0ac68e5bc9cd26bedf607e6d421d38ecace551c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}