This API create a new field or update an existing one:
Parameters:
curl -XPOST -H 'Content-Type: application/json' -d @my_payload \
"http://localhost:9091/indexes/my_index/fields/my_field"
Where the payload file (my_payload) contains the field definition:
{
"analyzer": "EnglishAnalyzer",
"stored": true,
"tokenized": true,
"index_options": "DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS"
}