{
  "manageEntity": {
    "action": "Save",
    "entityId": "1566240433",
    "entityType": "Track",
    "nonce": "0x0b5451e83924387cab716f498f1e9abdb8d012b4b931924260edf5286a020444",
    "signature": "0x5073dc0aadf4fe988c4a7548d9a66b344c4873fb5b28a514d3af92e7744310fb277f1467ca05145d975848863115763d2f0a091ca1d6167cf7ea3e9058e279061c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}