{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908163333",
    "entityType": "Track",
    "nonce": "0xec76c262334c1fae83a63d423c3b8f1723843eb35c5d9b20e8640dbfc3a54f3b",
    "signature": "0xc3c29b1d4847140a8addbe9918566cdf475253e3999610b8ceb0edbeece119ba083a76b62a749006d370829b466d9683b03cc1a89ed407a3a8c814637f9e41691c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}