{
  "manageEntity": {
    "action": "Save",
    "entityId": "1691686588",
    "entityType": "Track",
    "nonce": "0x59a241260cdcd5e06f220a4a6283d4869a43f17286209873489453b2c6c6ddf7",
    "signature": "0xb6685b7a84c6eb5a8bc3a69edf2f85c3c18f97eef6712fd3f5cb42605bfef92f1845747bfb2b196c5cbd1b689bad70977b4d7f35a16e782dfbf452f8842f89f51b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}