curl --request PUT \
  --url https://api.sandbox.monite.com/v1/counterparts/{counterpart_id}/partner_metadata \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-monite-entity-id: <x-monite-entity-id>' \
  --header 'x-monite-version: <x-monite-version>' \
  --data '{
  "metadata": {}
}'

{
  "metadata": {}
}