Nested query in nboost

[kapish5467]

I am trying to run a nboost search query on nested data which is -
"description":{"type":"nested","properties":{"BRIEF_SUMMARY":{"type":"nested","properties":{"plain":{"type":"text","analyzer":"my_analyzer"}}}

I want to look for contents in "plain" field and I am running following python script for it-
response = requests.get(
url='http://localhost:8000/patents/_search',
json={
'nboost': {
'uhost': 'localhost',
'uport': 9200,
'query_path': 'body.query.nested.match.description.BRIEF_SUMMARY.plain',
'topk_path': 'body.size',
'default_topk': 10,
'topn': 200,
'choices_path': 'body.hits.hits',
'cvalues_path': '_source.description.BRIEF_SUMMARY.plain'
},
'size': 200,
'query':
{'nested':
{'path': 'description',
'query':
{'nested':
{'path':'description.BRIEF_SUMMARY',
'query':
{'match': { 'description.BRIEF_SUMMARY.plain':}}}}}}
}

)

But I end up with following error-
{'doc': 'Mapping key not found.', 'msg': "('match',)", 'type': 'KeyError'}

Is this kind of query handled by nboost ?