{
  "manageEntity": {
    "action": "Save",
    "entityId": "532172751",
    "entityType": "Track",
    "nonce": "0x2b7b2507ea97841055af648414f79e17206c9a22cb51fa3ac6934593eedb382f",
    "signature": "0xb7b220405df02d5c931ce81b5df2ec767282ed68396417078c57fadc1905ac1e5b241c63cec59df02f022f49cd2f77638dcf72a940d0d574783f55d94e15e1511c",
    "signer": "0xC62d580617B6927bf532824Dd1e068646677b30F",
    "userId": "782022954"
  }
}