It does not look like it takes a hash. Those are few examples from the game scripts:
Line 11070: TASK::SET_ANIM_RATE(iLocal_38, 0.75f, 0, false);
Line 11071: TASK::SET_ANIM_RATE(iLocal_39, 0.75f, 0, false);
Line 11080: TASK::SET_ANIM_RATE(iLocal_38, 0.5f, 0, false);
Line 11081: TASK::SET_ANIM_RATE(iLocal_39, 0.5f, 0, false);
Line 1459: TASK::SET_ANIM_RATE(iLocal_1284, 1f, 0, false);
Line 1463: TASK::SET_ANIM_RATE(iLocal_1285, 1f, 0, false);
Line 17862: TASK::SET_ANIM_RATE(iLocal_1284, 0f, 0, false);
Line 17863: TASK::SET_ANIM_RATE(iLocal_1285, 0f, 0, false);