{
  "manageEntity": {
    "action": "Save",
    "entityId": "381789",
    "entityType": "Track",
    "nonce": "0xd336894c1ea558e92541bb2c8ce028eab815a6a7634ba616048af65c03ced6de",
    "signature": "0xdba931e83484d1063f6c52eeaed3d7c69d99b8b0e99b4948bf5b9e878e17f46b12354f7829096ac85c225258c1e4295d1c4fc892dbb92270e9b1f95b806e79b41b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}