{
  "manageEntity": {
    "action": "Save",
    "entityId": "1648301401",
    "entityType": "Track",
    "nonce": "0x51aa873f54fa7f03d5ef50af9aea3eaefd51e1f88373a71955580eaddbc3fc9f",
    "signature": "0x32cfcbb622e7b1678ee092a3a0b5d4d5c9fd51b7c544993e0ee2c646e38118cc160d5026588a79220e8db64335600888ebff404ea123922f6caa896c5427ab801b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}