{
  "manageEntity": {
    "action": "Save",
    "entityId": "288379",
    "entityType": "Track",
    "nonce": "0xe69270fa5cd9b9be2941c9c869d56e133471d0770f3b18f18d3490a06654e0b0",
    "signature": "0xf488600395ffec6218ecf910b247e7ce4d7f7f76260183f0d224ba85090f324d5928995433aa1ed9d21276a8153bd7b842185f210ee59f27231aab6cdcc664801b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}