{
  "manageEntity": {
    "action": "Save",
    "entityId": "1850942626",
    "entityType": "Track",
    "nonce": "0x65f298683227515325020dbbf18b2dd947a2591f604294b4fb32bbbe89e5de5d",
    "signature": "0xb45f1f192b3c65c3fc6a288a97a6f39992c39aa3a7ff5336f13663a1491c723b51bf6520c9cd51423321439c05a525b9547956239beee849cb45c8e94f9e0d5f1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}