usrstaking 的表格行类型
{ "name": "usrstaking_s", "base": "", "fields": [ { "name": "user", "type": "name" }, { "name": "stakinglevel", "type": "name" }, { "name": "stakings", "type": "extended_asset[]" }, { "name": "refundings", "type": "extended_asset[]" } ] }