{
  "manageEntity": {
    "action": "Save",
    "entityId": "1330298169",
    "entityType": "Track",
    "nonce": "0xdb20924a10d21fc0b83a9e90890ec65d38db39d9684e9cb21596eaf826225bd2",
    "signature": "0xf96ec593cb456735fc377e2a0f080616854d79827739a825fd8feb0526a2273a47a30fb47526f11f5a39269e2593d734e8d2768096fe95b87eab8b0bc9f0e25e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}