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30,621,669)."},{"block_number":8672696,"extrinsic_index":1,"extrinsic_hash":"0x89b275783fc656222e19591728d7f5412c2e4c837dcd4c294b4548d3c43b13c9","signer":null,"call_module":"MevShield","call_function":"announce_next_key","call_args":[{"name":"enc_key","type":"Option<BoundedVec<u8, 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