curl --location --request POST 'https://flow-mainnet.g.alchemy.com/v2/demo/transactions/' \
--header 'Content-Type: application/json' \
"script":"CiAgICAgICAgICAgICAgICBpbXBvcnM2ZDU4MDI3M2IKICAgICAgICAgICAgICAgIGltcG9ydCBOb25GdW5naWJ......b24gPC0gTE5WQ1QuY3JlYXRlRW1wdHlDb2xsZWN0aW9uKCkKCiA",
"reference_block_id": "06b8b564464b562fc48ce50245f02843831e9234cbaa0aadd1f4c251830ea462",
"payer": "b8c4eaae63469796",
"address": "b8c4eaae63469796",
"payload_signatures": [],
"address": "b8c4eaae63469796",
"signature": "OJucJiOnxHfdj9VNtZEEG2qNn5WUr1iuv0vAdOFvdSM5Y7Lwsr7r6T8f4FnSaU1N6GHK6eTOln+KSa+uGXywTg=="