[METAMASK] Syntax help

[CryptoCat]

Thanks for your answer.
Is it a regular base64 encode ?
I tried with the exemple here :

{data:wM+CSmCIIlaofXHPxCRFqbcPvEDZESBYM1XdAE8VFanedCIXvDEEt15nhzdv1pqzkW0MCQDBA5T1W1/Ltg7lKBszkoJJ1PtVHOpTn/afhvLyIp2VBBV1Tuj4s8LGo2GM9KOHn1Hn5BC1YhjP56opGrJlsIT9qnuGYHT8EtA5IiHP4zB4fwgGqDhtX+QUJi4rdm+apXZ1DpRvDq5J+bCca2GHXzU5H57Esn3THPXev3RdlkmjhuXVjV8=,iv:ejhZW94EsJZ049Sb/at0Xg==,salt:jgW3gi0eyPtXXguqMzi6uGyuR6m+lgQXw8onqivK5w0=}

It gives me this hash line once encoded :

$metamask$amdXM2dpMGV5UHRYWGd1cU16aTZ1R3l1UjZtK2xnUVh3OG9ucWl2SzV3MD0=$ZWpoWlc5NEVzSlowNDlTYi9hdDBYZz09$d00rQ1NtQ0lJbGFvZlhIUHhDUkZxYmNQdkVEWkVTQllNMVhkQUU4VkZhbmVkQ0lYdkRFRXQxNW5oemR2MXBxemtXME1DUURCQTVUMVcxL0x0ZzdsS0JzemtvSkoxUHRWSE9wVG4vYWZodkx5SXAyVkJCVjFUdWo0czhMR28yR005S09IbjFIbjVCQzFZaGpQNTZvcEdySmxzSVQ5cW51R1lIVDhFdEE1SWlIUDR6QjRmd2dHcURodFgrUVVKaTRyZG0rYXBYWjFEcFJ2RHE1SitiQ2NhMkdIWHpVNUg1N0VzbjNUSFBYZXYzUmRsa21qaHVYVmpWOD0=

One lauched in hashcat, it gives me a "token length exception" error.
No problem however with the example given here : https://hashcat.net/wiki/doku.php?id=example_hashes
Do you know why ?
Many thanks !