Filter by created_at, updated_at, state. state values: issued, draft, declined. available operators for created_at and updated_at: gt, gte, lt, lte, eq. available operators for state: in. example: filter[created_at][gt]=2019-01-01, filter[state][in]=issued,draft

Sort by one of the following: created_at, updated_at, state. available operators: asc, desc. example: sort=created_at:asc,updated_at:desc

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