{
  "manageEntity": {
    "action": "Save",
    "entityId": "874812864",
    "entityType": "Track",
    "nonce": "0xe70564a39be0de63620ac79d69af3ea6833ac6590002f893ea6bc819c94ad252",
    "signature": "0x67d480f44528c93b2a08a1162f5aff96dd47b24dd6abfb37d623e296a7b921946399ab14b679eca4002f97718b1b87a045e5625324ba140531f3ce37b398b4851b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}