{
  "manageEntity": {
    "action": "Save",
    "entityId": "394312660",
    "entityType": "Track",
    "nonce": "0x26c4448fdec968f883b9f9b324797279a16d88b148d0a77df863ecaec686748c",
    "signature": "0x12263a0cfdb403684b1cb39291997308ffe772aa6eae11b50d914977a949f9fe774cd573ddaff10c02790f5acf3266b0bb8046ece55f93703c532005890a10281c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}