{
  "manageEntity": {
    "action": "Save",
    "entityId": "1728441084",
    "entityType": "Track",
    "nonce": "0x0f64168a1ee3f93a99c71ebb332086f78905449a19143b965ef6d4a982211d9b",
    "signature": "0x54265b029b64e318ee34b3b4d5c46f7856ebd3fe0b00b4f382d21ac86a182abc07388925c1450e5b44ba0e6fed53cc116f2a56d49d74c99ad75fdcfb5052ba891b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}