{
  "manageEntity": {
    "action": "Save",
    "entityId": "169318",
    "entityType": "Track",
    "nonce": "0xcfc68379406109109e91438c21a8b653cb5305f78739244a9ad21ab7489f62a6",
    "signature": "0xdf5db1ccc5f77b0d532f1fa6f7ead4e343f4e6fd56e048eb1541e43dbc977d0d34875c38226a752eed708b6ad36aed4237cd68270c757e4266bc3e1e9a46df291c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}