Ok here is what is going on.
There is a bug in the DATA export pipeline that is erroneously exporting some tuning twice, as two different resources. I expect that one of the two resources is not being used at all, but need to investigate further to know for sure. The mod you have provided contains the one that does not look to be used, the key you should use is
545ac67a:006ca304:eb17356affd08ae8. I actually suggest that mods should contain both versions of the resource in case we make a fix that results in the game loading the other version, this is probably unlikely but can't say for certain until I understand why this is happening.
I have attached a better working version of your mod.
The next problem you will encounter is that club icons actually require three textures: 1) a large version (the one specified in the tuning), 2) a small version, and 3) one that is used for the 3D rendering. The keys for the other two resources are derived from the instance specified in the tuning. As follows:
Large fnv1 of "filename" (specified in tuning)
Small fnv1 of "filename_Small"
3D texture fnv1 of "filename_01"
For example, the Atom icon in the Get Together data is as follows:
00b2d882:00000000:1e76bce248b8a218 clubIndicator_EP02crownAtom
00b2d882:00000000:67d78fb2bdbb03d4 clubIndicator_EP02crownAtom_Small
00b2d882:00000000:991e42706742b66e clubIndicator_EP02crownAtom_01
Note that you will need to lay out the 3D texture in the same manner that ours is laid out.
Hope that gets you up and running,
SGMS