curl command not executing via shell script in bash

I'm learning shell scripting! For the same I've tried downloading the TCGA genome data using curl on ubuntu (Ubuntu 16.04.3 LTS) terminal.

sh. content

#!/bin/shecho /0c8a6022-b770-4a83-bac3-b1526a16c89a/;token=$(<gdc-user-token.2018-06-26T14_36_13.548Z.txt)export ec=18; while [ $ec -ne 0 ]; do curl -C - -H "X-Auth-Token: $token"'https://api.gdc.cancer.gov/slicing/view/0c8a6022-b770-4a83-bac3-b1526a16c89a?region=chr9:131270948-131270948'> STAD/chr9:131270948-131270948_C440.TCGA-BR-6453-01A-11D-1800-08.3_gdc_realn.bam; export ec=$?;done

If I run the sh script, downloaded file is empty, without any error message.

But if the run the command directly then it is working fine.

I will appreciate if anyone let me know the mistake I am doing in the script.