curl --request POST \
  --url https://api.heymilo.ai/api/v2/postings/{posting_id}/candidates/bulk/async \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "data": [
    {
      "name": "<string>",
      "email": "<string>",
      "phone_number": "+12065551234",
      "metadata": {
        "ats_stage": "phone_screen",
        "external_id": "candidate_xyz"
      },
      "data": {}
    }
  ]
}
'

{
  "data": {
    "ingestion_id": "<string>",
    "object": "ingestion",
    "status": "queued"
  },
  "meta": {}
}