{
  "manageEntity": {
    "action": "Save",
    "entityId": "1461396807",
    "entityType": "Track",
    "nonce": "0xe5fd3b4a3ffe4ba0405a2628ca4b4f3b4462eaa5de88372a47e7a81964a95fd3",
    "signature": "0x48faf1fcf968dc93184a446cdf97b7125236352268bda205b568e0f96a4b82d065611f5182841ef7ce82a2071b9bf449ef605fedb54feb12651c57910898e6081b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}