{
  "manageEntity": {
    "action": "Save",
    "entityId": "1700872582",
    "entityType": "Track",
    "nonce": "0x678039d7d86e997d15f7da945a55e3b66eba59ce86c56a21ddcf8c1890f39226",
    "signature": "0x04d10b9ac67f121adb1b6f13c99b4e75d3dd6d95ca08b9e0290a5139b64994d400ce8e4f7063f0a6422936f1a6d0e6e73e9770ad459b6fa1b93aded5651071281b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}