{
  "manageEntity": {
    "action": "Save",
    "entityId": "1820317319",
    "entityType": "Track",
    "nonce": "0x44319a4274f88e8cff96f01468e64f85e5ddf331b5258c8c3a3b6a342596eeef",
    "signature": "0xcc17d4bfe83acba89e0c7d51679bb2462dc682347c838726aeb432ee3f81e46b49753768906389613acadebdc89f8dcb7dc0ed7e5f0e74848efd17ca595915cb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}