{
  "manageEntity": {
    "action": "Save",
    "entityId": "1867618362",
    "entityType": "Track",
    "nonce": "0x7ef7bd18a01e7a8de29b4e6406ce1d102a555ce8262fcdf454a9555abe52aaf0",
    "signature": "0x9873a60f08f79dbffd016213fd7cd18045fead50b971e02aeb03ce84c2f371f613fef1aed72282e8586f6927714c6df85cf7148bedc719419224a22047ab9be31c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}