{
  "manageEntity": {
    "action": "Save",
    "entityId": "411523",
    "entityType": "Track",
    "nonce": "0xad99c0a67b9d5f20488a630670ee9564733ae62929aa2f1ae285e068cf7b408b",
    "signature": "0x5fa67f4dc48bba751e5b33cddc2bf89b0f33dd2cac753a9c46a31ca78ba2671272f9c5bd4437070c9295b2528dc8eebd1a776a929b18012665220ffefd2d25c51b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}