Edit a sequence step

Writes one sequence step's content. Send subject and body together for a manual step (the pair replaces the step's whole template), topic for an ai_generated or ai_reply step - setting a topic also regenerates the step's title with AI - and daysBetween to change the wait before the step. At least one field must be present. A manual campaign cannot be approved until every step has a subject and body, which is what makes this endpoint the missing piece for a machine caller. Only the token owner may edit steps. Rate limit: 30 requests/minute and 1,000/day per token owner, shared by every campaign, scheduled-send, campaign-template and knowledge-hub endpoint.

Errors:

• 404 CAMPAIGN_NOT_FOUND — No campaign with this id exists, it belongs to another account (including a campaign delegated to you or shared by your team's visibility settings), or it has been deleted.
• 404 SEQUENCE_STEP_NOT_FOUND — No step with this id belongs to this campaign.
• 422 CONNECTION_NOTE_TOO_LONG — The step is a linkedin_connection, whose body is the invitation note LinkedIn caps at 200 characters, and the body sent is longer.
• 422 VALIDATION_FAILED — Empty body, unknown key, subject without body (or the reverse), or a value out of range; param names the field.
• 429 RATE_LIMITED — More than 30 campaign requests in a minute, or 1,000 in a day, for this token owner (the bucket is shared by every /business/campaigns, /business/scheduled-sends, /business/campaign-templates and /business/knowledge-hubs call).
• 500 UNEXPECTED_ERROR — An unhandled failure; the detail stays in our logs and is never returned.

Requires one of the following token scopes: campaigns.