{
  "manageEntity": {
    "action": "Save",
    "entityId": "247921",
    "entityType": "Track",
    "nonce": "0xdedb43f9daae42756b5ecbbda0eef1c9ec0ad9124a93c6242fe2357baddb09dc",
    "signature": "0x2fe414e8de5c2241cfe549bbeec3590dcd4776d16419913ffb63f371fd612a1617cb539a00ce665e3e8d9a1adf9cb0be6f472457eb5eb1b17b8250a0f2acd59e1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}