{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462633517",
    "entityType": "Track",
    "nonce": "0x11d88acf1d9c7e99f5adec6308f613be345dd94a2fd9b9547ed7e8c969c778a9",
    "signature": "0x11ecadec6e4635cf81ca66536c3cda272d8c5cbd7591f73cdf1d79bce5c9d820616907d02ba963817b6c1d9e35468523eb4ed1ac9236084f83bd2afc341711ad1b",
    "signer": "0xD07A680d4F48bA7Cc076c23f40870AccBbad1987",
    "userId": "16411799"
  }
}