{
  "manageEntity": {
    "action": "Save",
    "entityId": "234397685",
    "entityType": "Track",
    "nonce": "0x10679c4aa8f04b2a4039f04377bee60d68dd5b493ac4d33508f105c7c7c9a2ee",
    "signature": "0x5e324645b349e8964435a97732ef8552c232cc2d223866078e84bbbbce2287bf54193c770a9b089425242de86261f6e9865b0cddd032541176074cd393a64da91c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}