{
  "manageEntity": {
    "action": "Save",
    "entityId": "341829",
    "entityType": "Track",
    "nonce": "0xa80e06501fecb76fc7c173c6b0b9d8a74535d888845e933a5cf9c8c4ad41f1c3",
    "signature": "0x3259629921d30736379a2c21e901853ca7a85b1980565c3304a1150bb3567bfa0ce0e7755678a7d40647f49a1142cd31f9811589fe14ee52e71f8c4b0592efb41b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}