{
  "manageEntity": {
    "action": "Save",
    "entityId": "1343765561",
    "entityType": "Track",
    "nonce": "0x90957e7f752f2edaf1605089ca65af77c24985c19424fca1ef74ec143f31ac7c",
    "signature": "0x3e68749e0d7e7966265a62961e72105e55d9d65fdbe0c5e60f72f51a91ee8cd124fe2eaa476540375b824c4638d7a3bf4b1390192ddc84e14f8445443c4118a41b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}