{
  "manageEntity": {
    "action": "Save",
    "entityId": "121328",
    "entityType": "Track",
    "nonce": "0xcc1c88ded945f809bb554b552df85de0cd6722cf96a5baec92a486d797b32f01",
    "signature": "0x876141a9970ab432cc79c84e2301c9f986f98dc36a6330c5d64b9b169145a6d93f75aa10d3da9a43331089c7ad138481a17c8dfe61ff513ae3c6a4508d0ea8a51c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}