{
  "manageEntity": {
    "action": "Save",
    "entityId": "124222",
    "entityType": "Track",
    "nonce": "0xfb2a8890925de9a275d2a2c24022d7c65a8cfb44c6fa1d4362841f2b0faf000a",
    "signature": "0xd70a18f7667b8097051c73e5c96c9ddbda1177bbb1fe9608ac8d2f3c45b2aff4280b007627ff63798c3d79929fb4182f13ad73dc3834a5e726b8b08572f36b291b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}