{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765834589",
    "entityType": "Track",
    "nonce": "0x71873f1241b87e737deafaa9b0078c08e0bd7674c43bf889659197f7d447bf44",
    "signature": "0x357555a192049e650fafbb503405d5df258a9abde36aa12ab457b158b1b45c5871a63f09d069d6b9c555391124d7c74926a9f0902e721bceeacd96058b70e5831b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}