I have implemented this async for api service to get payload.

 export function loadAsync() {
            return async dispatch => {
                try {
                    dispatch({ type: 'LOADING_START' }) 
                    const item = await asyncService.query()
                    const mapItems = item['payload']['items'];  // l need help here please
        
                    dispatch({ type: 'SET_GRADE', mapItems})
                    console.log('Actions: err in load',mapItems) 
        
                } catch (err) {
                    console.log('Actions: err in load', err)
                } finally {
                    dispatch({ type: 'LOADING_DONE' })
                }
            }
        }

Expected payload { "code": 200, "payload": { "items": [ { "name": "test test test test test ", "grades": [ { "name": "C" }, { "name": "A" } ] } ] } }