{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045951",
    "entityType": "Track",
    "nonce": "0x8dea7d0c70133c6203a4f893f908be6effea011c1187d0734c3cef6fb3a36338",
    "signature": "0x1c440f59acf099431edcd4bc9fd15d4972435640c85a43cb22fcb13c9ee9d11618673a57d3757964d1d9d1d4aec592c0ab609c0453afb072548acedc1026c1081b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}