{
  "manageEntity": {
    "action": "Save",
    "entityId": "1791785759",
    "entityType": "Track",
    "nonce": "0x2af93bbf1c766456a9a4feb550002a1d2401f9428b2af92a2e21fd28b4d75457",
    "signature": "0x3e233e92d543a57edaad9ed0d65f455ef7749a157be65790cfa3b40482156e2a6266830926faab95bb9ae105e40e6f2b5aba65818428513811bfe046a84aae0a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}