{
  "manageEntity": {
    "action": "Save",
    "entityId": "1513746073",
    "entityType": "Track",
    "nonce": "0xded17d3ec66f60156c1451db42082856335148339af0144c37a65c1dcd8b8336",
    "signature": "0x058b0ae0bd7c2db0b9f5736916c2111005a74e53b95b58d5360f05bf8d2f8a1b7bfe982bacc9a6b45dcc98e64868edbfc2adc3aa2a30f54ea51f4e75b5f6b7a41c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}