Note: All numbers are in hex.
Any offsets 'within the metadata block' are relative to the start of the metadata block.
You can download InternetRadioPlayerI.prs, the official sony Shoutcast 'player', for reference for the examples in the table.

OffsetContainsExample from InternetRadioPlayerI.prsNotes
0 through 3Magic number50525346Should always be 50525346 ('PRSF')
4 through 7Offset of the metadata block100
8 through 1Bunknown
1C through 1Flength of the metadata block167
20 through 2Funknown
30 through 33icon offset270
34 through 37icon size, padded2CD0rounds the file off to a multiple of 4 bytes
38 through 5Bunknown
5C through 5Foffset of the word 'icon' within the metadata block, indicating that there is an icon (? if you replace 'icon' with anything else, the file isn't corrupted, but the icon doesn't load)C
60 through 67unknown
68 through 6Bicon size, unpadded2CDC
6C through 6Foffset of the word 'title' within the metadata block11
70 through 73unknown
74 through 77offset of the actual title within the metadata block17
78 through 7Blength of the title19
7C through 7Foffset of the word 'info' within the metadata block3
80 through 83appears to be the number of entries in the 'info' block; could be completely unrelated6
84 through 97unknown
98 through 9Boffset of the word 'comment' within the metadata block36
9C through 9Funknown
A0 through A3offset of the actual comment within the metadata block3E
A4 through A7length of the comment50
A8 through ABoffset of the word 'copyright' within the metadata block8F
AC through AFunknown
B0 through B3offset of the actual copyright info within the metadata block99
B4 through B7length of the copyright info21
B8 through BBoffset of the word 'text' within the metadata blockBB
BC through BFunknown
C0 through C3offset of the actual author info within the metadata blockC2
C4 through C7length of the author info04
C8 through CBoffset of the word 'radioplayer_url' within the metadata blockC7
CC through CFunknown
D0 through D3offset of the actual radio player url within the metadata blockD7
D4 through D7length of the radio player url48
D8 through DBoffset of the word 'homepage_url' within the metadata block120
DC through DFunknown
E0 through E3offset of the actual homepage url within the metadata block12D
E4 through E7length of the homepage url2d
E8 through EBoffset of the word 'version' within the metadata block15B
EC through EFunknown
F0 through F3offset of the actual internal version info within the metadata block163
F4 through F7length of the internal version info3
F8 through FFunknown