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30,773,021)."},{"block_number":8710516,"extrinsic_index":1,"extrinsic_hash":"0xb1db40e0994f429c90e968e92fa992b6dc7720b9b74fca41550602ffd68c0854","signer":null,"call_module":"MevShield","call_function":"announce_next_key","call_args":[{"name":"enc_key","type":"Option<BoundedVec<u8, 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