Create a new pinned item

curl --request POST \
     --url https://cg.optimizely.com/api/pinned/collections/{collectionId}/items \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{
     "phrases": "",
     "targetKey": "",
     "priority": 1000,
     "isActive": true
     }'