How to understand the pronunciation as listed in Wiktionary

The Wiktionary entry as I found it looks as follows:

Pronunciation

• (Tokyo) わ[たし]【HH】 [wàtáshí] (Heiban – [0])
• IPA: [[ɰᵝa̠ta̠ɕi]]

Let's take a look what this means:

• (Tokyo)
  means the listed pronunciation is for the Tokyo dialect

• わ[たし]【HH】
  pitch accent notation with [◯]【H】 indicating a high pitch

• [wàtáshí]
  indicating pitch accent in a romanization (using the grave and acute accent diacritics on the vowel, with the acute accent ´ indicating high pitch)

• (Heiban – [0])
  indicating that the pitch accent is of the heiban-gata type, i.e. first mora ("syllable") has a low pitch and all subsequent morae have a high pitch — in dictionaries this would be denoted [0] since the number in brackets indicates after which mora the drop in pitch occurs (and in わたし there is no drop in pitch)

• IPA: [[ɰᵝa̠ta̠ɕi]]
  IPA (International Phonetic Alphabet) notation with

  • [/ɰ/] being an A-type sound (anticipating the -a of wa),
  • [/ᵝ/] indicating that for the sound the lips are closed a little (a type of secondary articulation)
  • [/a̠/] being a "standard" A-type sound, that is retracted (i.e. pronounced further back in the mouth than the [[a]] sound) as indicated by the minus sign diacritic below the [/a/]
  • [/ɕ/] being the usual SH-type sound in Japanese