{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488839202",
    "entityType": "Track",
    "nonce": "0x0ef4bc6e21c27f850210feba1bd85cde9ea5c72dc43e70f82e43ae1490bda132",
    "signature": "0xd30d1ac686a9b69148ea1be54b3f47d41859641bfddc9702e806e1a67e518a821f1167fe859b332b5933983daaf6f88c1a63720ccb70072ccebd97c0b46b4d1c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}