{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247765801",
    "entityType": "Track",
    "nonce": "0x6fb45c385439c027a209bfc579efd9c783d3f592ae46e009042d66f33f5b0c72",
    "signature": "0x7d75b045840311e34978032c71534595fc7761a6b0a564b4a23f392e9f38bf1c79ac61c88002326a3f00b45701899564c46c41d472c40d8aca88dbf8781ca9a51b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}