{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029540956",
    "entityType": "Track",
    "nonce": "0x3e0bc9c3e1d6ef89ef719a335e990b8975aa98be6bba2f064e52afa11ec092d1",
    "signature": "0x9958f462f708f5530610708936aa26a575e10bf712ca115ed21a505816fbd5b014b2d04d9f264e6cfd83e4ee17ca923069dd32e974bfef492a7cc614b5fb24741c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}