{
  "manageEntity": {
    "action": "Save",
    "entityId": "1517958698",
    "entityType": "Track",
    "nonce": "0x7e93b55bec8468e4f3a206ebd047054a4f1f91b272432006a7e407fea33083b3",
    "signature": "0x979dc6fac0f0553e31249a5726588c83c0cc8d92a357de1689fc705f0f58bc2639086a6dcf7573e877e54736f8fa119134d58248d678cb91346d00ccaac978ae1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}