Submit a campaign draft for sending. Only campaigns in 'draft' status can be sent; to send a campaign again, copy it and send the copy.
Supports both email and SMS campaigns. Behavior depends on the campaign's sending strategy:

• Immediate: Campaign will be sent immediately, with optional timezone optimization (email campaigns only)
• Scheduled: Campaign will be queued for the scheduled time with optional timezone optimization (email campaigns only)
• Personalized: Each contact receives the campaign at their individually optimized send time. Delivery begins on the scheduled date and may take up to 24 hours (regular email campaigns only)

Scopes:
campaigns.write

Rate Limiting:
This endpoint is rate limited to 400 requests per minute.