{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787414330",
    "entityType": "Track",
    "nonce": "0xa08154b5f5433ccd9dc33cf39cc22d1c66c195f283dd7ad591e3a19cb03a91ab",
    "signature": "0x3a74a13b3ce58cc668e5a6ff977c3ff8646b62a214aae17990178de28e2457cf7c8c99558d1f5cf8d74e89f4cdad5e040354e9df2e7529d28e58da6ee8bfb1f91c",
    "signer": "0x4aAea60f569dCcb07000e6BE00AdcC7F106eF3Df",
    "userId": "353528"
  }
}