Views:

Question:
Using the REST API, what is the json format needed to upload a file with a keyword field? 

Answer:
Below is a json body you can use to send a keyword field to store/update via the REST API.\

{  
   "Fields":
   [ 
       { 
       "FieldName":"KEYWORD_FIELD", 
       "Item":{
           "$type":"DocumentIndexFieldKeywords",
           "Keyword":[
               "Value1",
               "Value2"
               ]
           }
       } 
   ] 
}

KBA applicable for both Cloud and On-premise Organizations