Update Tier
Allows partners to pass a new tier and use a new contractId between the partner and the seller for audit purposes.
Currency of the gmv volume in ISO 4217 currency code. Please use currency that is defined in the commercial contract only (e.g., USD-equivalent volume for UK sellers).
Datetime field indicating when the tier update request was actioned, returned using the standard ISO 8601 format, in UTC Coordinated Universal Time).