curl --request POST \
  --url 'https://api.adside.ai/meta/mcp#create_custom_audience' \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "<string>",
  "method": "<string>",
  "params": {
    "name": "<string>",
    "arguments": {
      "name": "<string>",
      "subtype": "CUSTOM",
      "account_id": "<string>",
      "description": "<string>",
      "customer_file_source": "USER_PROVIDED_ONLY",
      "retention_days": 90.5,
      "rule": "<unknown>"
    }
  },
  "id": "1"
}
'

{
  "jsonrpc": "<string>",
  "id": "<string>",
  "result": {
    "content": [
      {
        "type": "<string>",
        "text": "<string>"
      }
    ]
  }
}