{
  "manageEntity": {
    "action": "Save",
    "entityId": "964645",
    "entityType": "Track",
    "nonce": "0xe82bf573be63c1054c415f15f54a95e8633e929f1d1455d0f5fdb6bd367462ca",
    "signature": "0x97cc96084f6895367711b5e8581dfe0b9c817438a78f93f1ef75572168e0e76e7930331255646b3d26cebeb1d6b94b66b4251c376adb562e2586508b27fae0c61b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}