problem when fetch contentState from api

it was rendered normally when i use data from local json file but it's not render when i fetch contentState from api even its a same data
here a code that i use to fetch data
` const fetchdata = await fetch('https://test.com/api/story')
const jsondata = await fetchdata.json();
this.setState({data:jsondata})`

a log from state.data where i save fetched data to
`{"blocks":[{"key":"d949g","text":"dasfsdaf","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}}],"entityMap":{}}`
a log from local json
`{"blocks": [{"data": [Object], "depth": 0, "entityRanges": [Array], "inlineStyleRanges": [Array], "key": "d949g", "text": "dasfsdaf", "type": "unstyled"}], "entityMap": {}}`