{
  "manageEntity": {
    "action": "Save",
    "entityId": "947406090",
    "entityType": "Track",
    "nonce": "0x760c3a1aaa0ce3967f0eada013f3df939133f9a47c478b0160b7b7d22712bf1f",
    "signature": "0x5ea662009fcfd116daaa65604448994e170f090e659376aea64835e0a674f09179dd4a30de6ea23a795b4c0ae395bb512155c00e9865492eceb192f4d49d2ae61c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}