{
  "manageEntity": {
    "action": "Save",
    "entityId": "9261545",
    "entityType": "Track",
    "nonce": "0xa723d35f18d3344e1c7ccc61e26ce8cf032d9844cc097e924aa4c6203415ac4d",
    "signature": "0xb4e72eecf17c4d660833e0537884ab73645572651b9a9a59f3c279454bcf6ea211c32e8614fbdfbe5d7a8ed8dddc0a57f856259884035d531a0758ae1a69b82d1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}