{
  "manageEntity": {
    "action": "Save",
    "entityId": "302332304",
    "entityType": "Track",
    "nonce": "0xfb4c824a535638310d4ebfb519135d66d0797bbc045e8d259307cff32c895664",
    "signature": "0xe76712e319234de6aaeee6da2162720e251857617997b066ce18975e9ff9386f39f8ac3f9c0662459a13d6055cf2107ad942ab8ee298f8af40217b0cfc02e5a21b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}