{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777231297",
    "entityType": "Track",
    "nonce": "0x1fbf55047eead2ed446d2993ff128ff51b1f7e93e6a3eef29debd5df319ed935",
    "signature": "0xc2928017ad32dd11ba92354dec0272190f8e0406f27472a320263ebdc912fdc7555e9ab3d4db479293fad3bfedd20c5bd6e7874493d903e6655ea47d18995f1a1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}