{
  "manageEntity": {
    "action": "Save",
    "entityId": "421047",
    "entityType": "Track",
    "nonce": "0xcdd120768bd1d7e978805989def3d5072a926fe969ff2b5ed5b96f7de82e2ac6",
    "signature": "0x5d5ab48bb8bc01df2494ad6d8feb54fa88933826079348947438683c91f3d9101aef37fab7f4fe8eba52dc99aec2a779dea6ccc52092b18382e107da7d0281cf1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}