{
  "manageEntity": {
    "action": "Save",
    "entityId": "583540563",
    "entityType": "Track",
    "nonce": "0xc49c42f0c0f1135580565490c0da5aa838ed551d2f354b8016d03d25ca129f36",
    "signature": "0xa4e8c92bb9d43db6981af3da55332ef0d81826ef8ae0b76f31f6ae9ba14eee18546fcecf13a1da3775f5029bbed17a5fa1a04c609b6ddaebb1251264a23e1b9a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}