curl --request POST \
  --url https://api.hubapi.com/media-bridge/v1/{appId}/schemas/{objectType}/associations \
  --header 'Content-Type: application/json' \
  --data '{
  "fromObjectTypeId": "<string>",
  "name": "<string>",
  "toObjectTypeId": "<string>"
}'

{
  "createdAt": "2023-11-07T05:31:56Z",
  "fromObjectTypeId": "",
  "name": "",
  "id": "",
  "toObjectTypeId": "",
  "updatedAt": "2023-11-07T05:31:56Z"
}