{
  "manageEntity": {
    "action": "Save",
    "entityId": "772913084",
    "entityType": "Track",
    "nonce": "0x6bc66c9cdc258ce84474f309e09b4f3fcd7a4e95f2ac5f533b24a0193f16fee2",
    "signature": "0xc9bb49e7ee2770e5d83563cb592da657aa5f80acd5d432ee4589b82448e2d6962909dafba587de5d35cdcff70d1c874c6ce1926e59bd94ea387823e8509115531b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}