curl --request PUT \
  --url https://app.formbricks.com/api/v2/management/contacts/bulk \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "environmentId": "env_01h2xce9q8p3w4x5y6z7a8b9c0",
  "contacts": [
    {
      "attributes": [
        {
          "attributeKey": {
            "key": "email",
            "name": "Email Address"
          },
          "value": "john.doe@example.com"
        },
        {
          "attributeKey": {
            "key": "firstName",
            "name": "First Name"
          },
          "value": "John"
        },
        {
          "attributeKey": {
            "key": "lastName",
            "name": "Last Name"
          },
          "value": "Doe"
        }
      ]
    },
    {
      "attributes": [
        {
          "attributeKey": {
            "key": "email",
            "name": "Email Address"
          },
          "value": "jane.smith@example.com"
        },
        {
          "attributeKey": {
            "key": "firstName",
            "name": "First Name"
          },
          "value": "Jane"
        },
        {
          "attributeKey": {
            "key": "lastName",
            "name": "Last Name"
          },
          "value": "Smith"
        }
      ]
    }
  ]
}'

{
  "data": {
    "status": "<string>",
    "message": "<string>"
  }
}