{
  "manageEntity": {
    "action": "Save",
    "entityId": "170686",
    "entityType": "Track",
    "nonce": "0x578d89ea0cffe63bdb2a302ee4109980cdc0a648b51528c5d256f33085a9b52c",
    "signature": "0x00b34eb7ea66570acace7f99cb27bb4dd9fa2184517ac0c8af7d2a4031b93dff031797b98b6140aace25465e805d801b3efefed508106b8a681bf67a3b35e4291b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}