{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111484",
    "entityType": "Track",
    "nonce": "0xe555b58bede98d408c7086327319dde3265cedff527e676acfe07765e0f58139",
    "signature": "0x0ac3e7666bf994e4162563237bce42331c73d7a4e13df61bb730480ed3054cf15e9124544c59f2c17a7ea2a604deb7164328f26a6fd5de20c534a81fd9ee014c1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}