{
  "manageEntity": {
    "action": "Save",
    "entityId": "687892112",
    "entityType": "Track",
    "nonce": "0xfed697683c496f15e84e1a7355dee898cba23d113c091a844b953cfeeb5bdf3f",
    "signature": "0x06d37e990ae7a3e84de6667bb445a289f2db5a67be9415139fbb3e5960070d2c5bffe0eb1db9924bf21144ef31d4f6f645eff1f904529e03a9fb749a968266051b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}