{
  "manageEntity": {
    "action": "Save",
    "entityId": "31713951",
    "entityType": "Track",
    "nonce": "0x48d81dbd014ebb2ee54fa580b00e931f44d0cc0e3db24252fd04af2ab731668c",
    "signature": "0xc553d152c5cc85ba64f88d614cac2e7ef8a69e7d7cbf5154213c8b8ca5d911b82a51583acdf2a9160004c84c865b0a21ac84d2ed82d9e47d82058fb58c5396081b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}