{
  "manageEntity": {
    "action": "Save",
    "entityId": "462502473",
    "entityType": "Track",
    "nonce": "0xb35ec75adbf6c4f9769617e367267f6b1d866bc6022d925364e4a5c7f347535b",
    "signature": "0x3c3daafe3035c0a301684e37cbd13378d2d72219dd933c3cdd24b1546479db3b59fe09a2c4c7d240ff835fe3ce56560176c3b5f18f3578e897d0318b93bf1e941c",
    "signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
    "userId": "599751364"
  }
}