{
  "manageEntity": {
    "action": "Save",
    "entityId": "434609594",
    "entityType": "Track",
    "nonce": "0x69403f6da2bf204889a561c00b23fa6821058edaa2b9d6c92dfb194725d3b447",
    "signature": "0x8ed00afe1bee4f5adbe17f578b0f79434dc7bc0554d7906172e30e16f4ab896d0bd349521004ee249f2edf43a617214db50a9d24264ea04889ff45f82269f9831b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}