{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131738",
    "entityType": "Track",
    "nonce": "0xd9f2fcc13139bdec1a30e85d9e9a43e8687cc3c2d0aef0af5c1129e7dffdc9b9",
    "signature": "0x4d5af85ce3c0b67d5d0102470cd43fc360e883e04f3f3def28bf73d70e1814785852d1bdea0439729e669fa8c9f6d9ed79a790e2fb4e8217aaf26ba981733cc81b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}