add logs to debug invalid sig

[Hitenjain14]

Changes

Fixes

Tests

Tasks to complete before merging PR:

• Ensure system tests are passing. If not Run them manually to check for any regressions 📋
• Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 14.78%. Comparing base (e5018a7) to head (41b1748).
Report is 119 commits behind head on staging.

Files with missing lines	Patch %	Lines
...et/blobbercore/handler/object_operation_handler.go	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@ Coverage Diff @@ ## staging #1491 +/- ## =========================================== - Coverage 14.88% 14.78% -0.11%  =========================================== Files 179 180 +1 Lines 20222 20225 +3 =========================================== - Hits 3011 2991 -20  - Misses 16839 16864 +25  + Partials 372 370 -2 

Flag	Coverage Δ
Unit-Tests	14.78% <0.00%> (-0.11%)	⬇️

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