{
  "manageEntity": {
    "action": "Save",
    "entityId": "163786603",
    "entityType": "Track",
    "nonce": "0x37309b7c19995c8947b67fbddddda9534e8b37c6dd82f0d302b965656fc03b0a",
    "signature": "0x061b76d85a064fd0284cfd3b4cb20e8a6163d17627934296fbe41f17722703f17c90cd7a76d52c38a74295fc595b6130d59d56a6fe9e9ce94ca025922a8cdb1a1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}