{
  "manageEntity": {
    "action": "Save",
    "entityId": "395877604",
    "entityType": "Track",
    "nonce": "0x8016c1d1bd9911d00e5e09b9bd2fe7224f8d59365d7633d4fd29cf4063096468",
    "signature": "0x2ba45620eac34c24dfb0922cededf5020ce8bcda4aa1b022bc24a40c093f6f9322789380d398aaaacc9f35a3b579d98a633e06ac693303a105773a10d42057751c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}