{
  "manageEntity": {
    "action": "Save",
    "entityId": "28960891",
    "entityType": "Track",
    "nonce": "0xae53485dc0587d62dcfd25b6a772e27eaf0c3742e9c9247efc9018e610e02dda",
    "signature": "0x21fd49ba153b486a441840f6fe7dae72ee18f44b3bcdc48c4a6ce2b9f74e612104ca1378a95e8a415230eda67150eac099dd2d1762b8107b7cf74f3625d3eecb1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}