{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609184913",
    "entityType": "Track",
    "nonce": "0x5dc18851de4301e55dbaa6b91d2ab64860fe2283d8b5cf369c8c37b741ab85ab",
    "signature": "0x309a60624310a573ba33764cfe7453c780f37d5ff62b3ffbc398a1193b8e4cae22a43266a618663085913a56d11edda797235047466a4adbbd22f8b68fd1e9fe1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}