{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342042204",
    "entityType": "Track",
    "nonce": "0x2fcd1302be682d102789ef9ba20792b1d384f21a49b6073302d59615ac553eb4",
    "signature": "0x9b8ac220dbbefacbf50c992e6a9db332a1e383c3531f024ca407aafa3b8c93a87e4f0cd6ecd06768e9fe9faa44a87801dfd691f9d2f3d2ac217e975beacf6b8d1b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}