Send a payout you previewed, using its previewToken.

A preview token from another tenant returns 404.

Authenticate with a dashboard session token, or a payout_write API key in X-API-Key (create one with POST /v1/api-keys/payout; it is pinned to one merchant and expires within 90 days). A payout key acts only for its own merchant. A merchantId for another merchant, another merchant's recipient or payout, or a path tenantId other than the key's tenant all return 404. A znz_pt_ key sends only sandbox payouts and a znz_pl_ key only production payouts. Payouts made with a key record it as the actor. Merchant secret keys, publishable keys and agent_onboarding keys are refused.