{
  "manageEntity": {
    "action": "Save",
    "entityId": "589358997",
    "entityType": "Track",
    "nonce": "0x8424ecc17d93e25fb0b5bd4d7cff1f8d47d55f0b5a2b307e9b045922eb93a3a4",
    "signature": "0x8871d6fe39c8c01554ac975e3d52998a731d08bb8417dbcc60a50e53b8f5c7a61dd934b5e32096732d87c857ba66c16a961298a834e30085fb560f72ed109cd81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}