Nested query for Multilinestring

[sjain227]

I have a multilinestring geometry type which has nested query. What should I provide in the config to make query something like below:
esquery {
"index": "test_index",
"body": {
"size": 6000,
"query": {
"nested": {
"path": "test_abc",
"query": {
"bool": {
"must": [
{
"exists": {
"field": "test_abc.pqr"
}
}
]
}
}
}
}
}
}

If I give "geometryField": "test_abc.pqr" in the config, It does not work.