fix the extract eth signature and convert it to r,s,v part

[KarishmaBothara]

While testing on rata, figured out that the notary keys are

[
  '0xf88bc2c5918b40a8aa1905f3fc5e4b90b2a3142c',
  '0x478adb7a82be57337f433c6e515ee817b45d936e',
  '0x7d0f662f04ac77fdc1c8e51da2f9aea7c1aabc7f',
  '0x360bf1d9d6319afbbb678dea92842b76c3b4f3a9',
  '0xb94719a6a34656f76002590a52ef4d2e8a29c7ec'
]

and signatures in event proof comes as

[
"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"0xb209b017eba3a753f6bf56b440d901065f99e18de0de1fc65186050b44a0531d5fdbcbf7d7f87b8ed389cc9c27a79085afd681a7517fa8260c95c5dd9d0d09c200",
"0x73be4d71e2bde9ee902e8c6e6e04418d39665e14551897e61dd41f559f3103747f4123876a94dfbfd741ce6bfaae909c912d43ad5279de23da969124894fc1f900",
"0x9515c8ebba46d75b77f84bb02261662517962147ee33a528c7d7c9f45497df1877b828c235ecc80d47ec4c93668d0b991ff729ae38e5f20459236010b0320d7001",
"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
]

so we should not ignore 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 as it has to be one -to- one with notary keys