{
  "manageEntity": {
    "action": "Save",
    "entityId": "424648332",
    "entityType": "Track",
    "nonce": "0x956e34a2fb8184d3ce554f45764e4f585dd7d46d1ae57a72ab5d607372491ff7",
    "signature": "0x8d8d92041d85fa2e6bf2a897124f55714f4546b02fc69b5a8d1424d7f2428fad1a1e50ec773e41a4578b2febc5780ef36f62d2150102d84842442e6b6ad78f5b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}