{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775916654",
    "entityType": "Track",
    "nonce": "0x14873454384dd7cb5d318eb37242eb4dff9d493e03c9790ac9e9f70e88c4a477",
    "signature": "0xca2608f9abe38e769648bacbadc2a3003971d1959b79f383fc2663ac9aa205e34d8ddd43154c45005dba47122a69456b4e8f43849925e41b74fc97c6366a923c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}