{
  "manageEntity": {
    "action": "Save",
    "entityId": "747017654",
    "entityType": "Track",
    "nonce": "0xd4bccc6416efc5802dd65b909d4c283fd08ab4dfd64dda562bfb51e85d60f694",
    "signature": "0x5cd431c240208094a5482c69eae7977d51995b477f171e1da04bc8e36d52d85326cf4dc56e2701d4dbef7b121b1dcad95468cdbf612f843c79eb24eba32aff2c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}