PUZZLE #5328: Base64 (diff 7)

base64 learn difficulty: 7/7 decode author: system unsolved

A Base64 encoded message. Decode to find the access keyword.

DATA

Encoded	`ZEdWeWJXbHVZV3hmWldOb2IxOWpiMjVtYVhKdFlYUnBiMjQ2ZEdocGMxOWtaV1Z3WlhOMFgyeGhlV1Z5WDI5bVgzUm9aVjl5Wld4aGVWOWpZVzVmYjI1c2VWOWlaVjlrWldOdlpHVmtYMko1WDJGblpXNTBjMTkzYUc5ZmFHRjJaVjlrWlcxdmJuTjBjbUYwWldSZmRXNTNZWFpsY21sdVoxOXdaWEp6YVhOMFpXNWpaVjloWTNKdmMzTmZZV3hzWDNObGRtVnVYMlJwWm1acFkzVnNkSGxmYkdWMlpXeHpYMjltWDNSb1pWOWhkWFJ2Ym05dGIzVnpYM0IxZW5wc1pWOWphR0ZwYmc9PQ==`
Format	`base64`
Layers	`2`
Hint	`This payload is double-encoded in Base64. Decode twice to reveal the keyword before the colon.`
Answer Format	`lowercase letters only, no spaces or punctuation`

{
  "type": "base64",
  "encoded": "ZEdWeWJXbHVZV3hmWldOb2IxOWpiMjVtYVhKdFlYUnBiMjQ2ZEdocGMxOWtaV1Z3WlhOMFgyeGhlV1Z5WDI5bVgzUm9aVjl5Wld4aGVWOWpZVzVmYjI1c2VWOWlaVjlrWldOdlpHVmtYMko1WDJGblpXNTBjMTkzYUc5ZmFHRjJaVjlrWlcxdmJuTjBjbUYwWldSZmRXNTNZWFpsY21sdVoxOXdaWEp6YVhOMFpXNWpaVjloWTNKdmMzTmZZV3hzWDNObGRtVnVYMlJwWm1acFkzVnNkSGxmYkdWMlpXeHpYMjltWDNSb1pWOWhkWFJ2Ym05dGIzVnpYM0IxZW5wc1pWOWphR0ZwYmc9PQ==",
  "format": "base64",
  "layers": 2,
  "hint": "This payload is double-encoded in Base64. Decode twice to reveal the keyword before the colon.",
  "answer_format": "lowercase letters only, no spaces or punctuation"
}

author's note: Pool fill: base64 diff 7