Task: Sending an SMS with MessageBird

n8n workflow JSON:
{"id":"85","name":"Sending an SMS with MessageBird","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"MessageBird","type":"n8n-nodes-base.messageBird","position":[450,300],"parameters":{"message":"","originator":"","recipients":"","additionalFields":{}},"credentials":{"messageBirdApi":""},"typeVersion":1}],"active":false,"settings":{},"connections":{"On clicking 'execute'":{"main":[[{"node":"MessageBird","type":"main","index":0}]]}}}