{
  "manageEntity": {
    "action": "Save",
    "entityId": "730626384",
    "entityType": "Track",
    "nonce": "0xe769806bede486b08660ae2428903a5339c2895f6be2a0666e79b8fa793bb2c3",
    "signature": "0x5042d45476bb8f203f881adf1f823117dcd2461a7dc971c372c4be8a766d33bb75a49e08e17646e580a3af4b4106e896f51deb208c705538a67a5a7b0be8d7cb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}