{
  "manageEntity": {
    "action": "Save",
    "entityId": "474696015",
    "entityType": "Track",
    "nonce": "0x9f306b6599c1309fef9d1a2447be967ed90413ef8641465b4707a5e7d6bc9736",
    "signature": "0xab70c7944765788c6e421cdc496e613a54ad292223e4e1954da8cfbd90545c3600f3817ff2502c50294a194c4615ebdbdbbcb1eeb757b939c72843fb0baedaa11c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}