{
  "manageEntity": {
    "action": "Save",
    "entityId": "598247",
    "entityType": "Track",
    "nonce": "0x055c319a0a526eb09ea401b1594240cabcefcf0ae45df836ea30984fe3df2b25",
    "signature": "0x524804f6e94e7ae980b6560d24cc98bb7f71dcedc4ca9cc0c3739c84859722d072b04545faf5e5fc4ba0e72c35eeb23433fa8b5e128677a29275f60500e5a2551b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}