{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915136343",
    "entityType": "Track",
    "nonce": "0x0388690a0ce2febb98a9f5c60090f2c66a7652df5a0e33670a12c894d9a228cf",
    "signature": "0xa9141b4a2b6282383b2b08eb541cac0bb799001caf03b0eedfc3f8b0b16866b138cc5ba51c37282472101a96598183ce61493adb084815c98491e559938c66d81b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}