{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963400828",
    "entityType": "Track",
    "nonce": "0xdbde66ee2b05b60e611ac091f3f59047284a84252350132b5f3cca55c9215167",
    "signature": "0x5206f85f180a5c093bfa9c2e30a6cb3f23bfaf3c272f5f0cb301bd73e728196546645d8a29e3d400a9b990f0def6161a08981f4ee47cb507954685ff97ba16d21b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}