api not call using dispatch

I am trying to call the api and write the following function in react and using redux

export function fetchRecordingJson(file_name) {
  return (dispatch, getState) => {
    return axios.post(API_URL+`fetchjson/`, {file_name})
      .then(json => {
        dispatch(receiveJSON(json.data, file_name))
        console.log(dispatch(receiveJSON(json.data, file_name)));
      })
  }
}

and call it using the syntax

dispatch(fetchREcordingJson(file_name))

When it hit the function it not hitting the api and return any result, any one who work on functions using dispatch can help me to understand the issue