curl --request POST \
  --url https://mycluster.domino.tech/rpc/merge-tags \
  --header 'Content-Type: application/json' \
  --data '
{
  "sourceTagIds": [
    "<string>"
  ],
  "targetTagId": "<string>"
}
'

{
  "mergedCount": 123,
  "reassignedEntities": 123,
  "targetTag": {
    "fullPath": [
      "<string>"
    ],
    "id": "<string>",
    "label": "<string>",
    "namespace": "<string>"
  }
}