{
  "manageEntity": {
    "action": "Save",
    "entityId": "690943",
    "entityType": "Track",
    "nonce": "0x0cfe98a96530ac67ccd0a132f6299cac469f94a1c843833c005a1fc2555d5c1b",
    "signature": "0x18acb65fe21f13e0ba8bd15bd0eead0464a32320a2b29abecf80f13c3e52627c675e54930d7a3cdfc75dd450358647ab96cb0bad431ba45f7c56626991dba3151b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}