health = '/api/health'
lists = '/api/lists'
lst = '/api/lists/{list_id}'
subscriber = '/api/subscribers/{subscriber_id}'
subscribers = '/api/subscribers'
opt_in = '/subscription/optin/{subscriber_uuid}'
send_tx = '/api/tx'
campaigns = '/api/campaigns'
campaign_id = '/api/campaigns/{campaign_id}'
campaign_id_preview = '/api/campaigns/{campaign_id}/preview'
templates = '/api/templates'
template_id = '/api/templates/{template_id}'
template_id_preview = '/api/templates/{template_id}/preview'
template_id_default = '/api/templates/{template_id}/default'
