{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938277084",
    "entityType": "Track",
    "nonce": "0xf7a2c2c04eb9953489261c0f10c9b5823da347a3bc51ac1ca17162d1d5ae0cd8",
    "signature": "0x181aaeef0170ae747e5042ed01b43c7ac54763459a54917f1cc21a1c9eb8b4be72cfc27526dff9f1de742c4a1221d485d07c335236d25e8f4617829d1398af941b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}