{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742292605",
    "entityType": "Track",
    "nonce": "1790274058457221001",
    "signature": "0xc009b7ef874c17382cb0de471714a7228c74837aaca0ee3beffd34e7430822af78a9f53d3dc5ace6c61d2a1414149cb4c8c6c9ac3ee3ef7b35e3a853151a0b381b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}