{
  "manageEntity": {
    "action": "Save",
    "entityId": "465748822",
    "entityType": "Track",
    "nonce": "0x33ac66993eb54ce96e2947c5c7a4ebd890bd80d806aeaf943bf36ffaf16862be",
    "signature": "0x89d06e4297796a3f90c14bd9bfe35d8577e3d8cc812784033158ffac5c0c00b05a1256fb0d9e5786aae89656f36c4106d64ce715d48057f5ed26c4daf14622901c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}