Changes to GET /tracks/:track_id/stems

added the required property latest_chain_block to the response with the 200 status

added the required property latest_chain_slot_plays to the response with the 200 status

added the required property latest_indexed_block to the response with the 200 status

added the required property latest_indexed_slot_plays to the response with the 200 status

added the required property signature to the response with the 200 status

added the required property timestamp to the response with the 200 status

added the required property version to the response with the 200 status