{
  "manageEntity": {
    "action": "Save",
    "entityId": "387029910",
    "entityType": "Track",
    "nonce": "0x57d035e12c33a68c1ba628f8c6d1965cddf41fee7fd6f81c4e0ee00c5e3cda7c",
    "signature": "0xe892e28d038c4ef6a71420646c953f7ab8eae977289245bd1081ac368e21d4821c06a00cb2fb49f97ad37777da25584cff3c3fff1e6dac7a8ad384d4a52084db1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}