Epcor Power Outage Areas Query is an example object payload from EPCOR, with 10 top-level fields. It illustrates the shape of data this provider's APIs accept or return.
{"objectIdFieldName":"OBJECTID","uniqueIdField":{"name":"OBJECTID","isSystemMaintained":true},"globalIdFieldName":"GlobalID","geometryProperties":{"shapeAreaFieldName":"Shape__Area","shapeLengthFieldName":"Shape__Length","units":"esriDecimalDegrees"},"serverGens":{"minServerGen":5026811,"serverGen":5026811},"geometryType":"esriGeometryPolygon","spatialReference":{"wkid":4326,"latestWkid":4326},"fields":[{"name":"OBJECTID","type":"esriFieldTypeOID","alias":"OBJECTID","sqlType":"sqlTypeOther","domain":null,"defaultValue":null},{"name":"id","type":"esriFieldTypeString","alias":"ID","sqlType":"sqlTypeNVarchar","length":256,"domain":null,"defaultValue":null},{"name":"Shape__Area","type":"esriFieldTypeDouble","alias":"Shape__Area","sqlType":"sqlTypeDouble","domain":null,"defaultValue":null},{"name":"Shape__Length","type":"esriFieldTypeDouble","alias":"Shape__Length","sqlType":"sqlTypeDouble","domain":null,"defaultValue":null},{"name":"GlobalID","type":"esriFieldTypeGlobalID","alias":"GlobalID","sqlType":"sqlTypeOther","length":38,"domain":null,"defaultValue":"NEWID() WITH VALUES"},{"name":"estresto","type":"esriFieldTypeString","alias":"Est. Restoration Time","sqlType":"sqlTypeOther","length":50,"domain":null,"defaultValue":null},{"name":"faulted","type":"esriFieldTypeString","alias":"Faulted At","sqlType":"sqlTypeOther","length":50,"domain":null,"defaultValue":null},{"name":"affcusts","type":"esriFieldTypeString","alias":"Affected Customers","sqlType":"sqlTypeOther","length":15,"domain":null,"defaultValue":null},{"name":"cause","type":"esriFieldTypeString","alias":"Cause","sqlType":"sqlTypeOther","length":200,"domain":null,"defaultValue":null},{"name":"nbhoods","type":"esriFieldTypeString","alias":"Affected Neighborhoods","sqlType":"sqlTypeOther","length":1000,"domain":null,"defaultValue":null},{"name":"affstree","type":"esriFieldTypeString","alias":"Affected Streets","sqlType":"sqlTypeOther","length":2147483647,"domain":null,"defaultValue":null}],"exceededTransferLimit":true,"features":[{"attributes":{"OBJECTID":12883,"id":"INC 218006057","Shape__Area":null,"Shape__Length":null,"GlobalID":"86f1e356-7e39-4ab8-9fac-fbd22371f2be","estresto":"Jul-27 5:30 PM","faulted":"Jul-25 9:39 PM","affcusts":"1","cause":"Under review","nbhoods":"Parkview","affstree":"VALLEYVIEW CRESCENT NW, VALLEYVIEW DRIVE NW, VALLEYVIEW POINT NW, 88 AVENUE NW - 92A AVENUE NW, 137 STREET NW - 143 STREET NW"}},{"attributes":{"OBJECTID":12884,"id":"INC 218006058","Shape__Area":null,"Shape__Length":null,"GlobalID":"a6b9b277-4365-4c2f-baa6-b069677e49f3","estresto":"Jul-27 5:00 PM","faulted":"Jul-25 9:39 PM","affcusts":"1","cause":"Under review","nbhoods":"Laurier Heights","affstree":"BUENA VISTA ROAD [EASTBOUND SI, BUENA VISTA ROAD [WESTBOUND SI, BUENA VISTA ROAD NW, 80 AVENUE NW, 82 AVENUE NW - 87 AVENUE NW, 138 STREET NW - 145 STREET NW, 142 STREET [NORTHBOUND SIDE] NW, 142 STREET [SOUTHBOUND SIDE] NW"}}]}