Minor JSON field name fixes and additions

[hamishcoleman]

Errors and omissions found during real-world use of the API

[codecov-commenter]

Codecov Report

Merging #865 (0b48486) into dev (ae502d9) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev     #865      +/-   ##
==========================================
- Coverage   18.37%   18.37%   -0.01%     
==========================================
  Files          41       41              
  Lines        8512     8513       +1     
==========================================
  Hits         1564     1564              
- Misses       6948     6949       +1     

Impacted Files	Coverage Δ
src/edge_management.c	0.00% <0.00%> (ø)

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