{
  "manageEntity": {
    "action": "Save",
    "entityId": "291719475",
    "entityType": "Track",
    "nonce": "0xc605a1754860244dcaf92f584f4eb9d34cb28e0170266582a4466e0c111b5cef",
    "signature": "0x7b075b3b41d032271cba008aa020a9c1fe1878494c39904cb5242fc9496b23900195d3864a2b6f041ac2b9f69a2417c69de8da17cf8338fb96afca64d50e3a181c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}