I only had to delete all new lines and it worked!
for example this works ... notice the big double quotes text is now several smaller quoted strings
"v=DKIM1;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAm1MmXbj57e""dW5nN1Yi6SxLBa+n4DcMTL8+fbhqarL0PRlzlriOtxWmqZzKlkoh9I0eBXgSNj2g""pUUl32fEirdf2KM7ZAxbvJohn1P/18I3lr65CjQGPm5iljIVQFPpUzwepbVt""frg/MjJtMkE2JeSs03TBTtCkthepQrV/tmMVoqycOhp32LklGtqfl/eYNnjFDPt5""ID0FZMlXucdkMl4fapi66edKKAbK0RLgOZ19uE2EdGkU+lDaVVcBdJ9omTnTf2kq""4zdZ9K+PG7GJO0vyRSIzyCMGnAmEkgyTFEBh7+hrVKapr71o6/y3eXtYToQiC5qP""1vX6u7o6kkd/Bi7QIDAQAB"
Notice I had to transform a very long string into a series of smaller strings
original :
"this is sample very long string alaalal bblblbbl ckckcck "
what works :
"this is sample very"" long string alaa""lal bblblbbl ckckcck "