shellscript to send post requests in a curl loop

plan.sh

#!/bin/bash

array=('{
"product_id": "",
"name": "Private Austria (20.00%)",
"description": "Private Austria (20.00%)", 
"billing_cycles": [ 
{ 
"frequency": { 
"interval_unit": "MONTH", 
"interval_count": 1 
}, 
"tenure_type": "REGULAR", 
"sequence": 1, 
"total_cycles": 0, 
"pricing_scheme": { 
"fixed_price": { 
"value": "8", 
"currency_code": "EUR" 
} 
} 
} 
], 
"payment_preferences": { 
"auto_bill_outstanding": true, 
"setup_fee": { 
"value": "8", 
"currency_code": "EUR" 
}, 
"setup_fee_failure_action": "CANCEL", 
"payment_failure_threshold": 1 
}, 
"taxes": { 
"percentage": "20",
"inclusive": false
}
}'
'{
"product_id": "",
"name": "Private Belgium (21.00%)",
"description": "Private Belgium (21.00%)", 
"billing_cycles": [ 
{ 
"frequency": { 
"interval_unit": "MONTH", 
"interval_count": 1 
}, 
"tenure_type": "REGULAR", 
"sequence": 1, 
"total_cycles": 0, 
"pricing_scheme": { 
"fixed_price": { 
"value": "8", 
"currency_code": "EUR" 
} 
} 
} 
], 
"payment_preferences": { 
"auto_bill_outstanding": true, 
"setup_fee": { 
"value": "8", 
"currency_code": "EUR" 
}, 
"setup_fee_failure_action": "CANCEL", 
"payment_failure_threshold": 1 
}, 
"taxes": { 
"percentage": "21",
"inclusive": false
}
}'
)

for element in "${array[@]}"
do
    curl -X POST \
      https://api.paypal.com/v1/billing/plans \
      -H 'Accept: */*' \
      -H 'Authorization: Bearer XXX' \
      -H 'Content-Type: application/json' \
      -H 'Host: api.paypal.com' \
      -d "${element}" >> output.txt
done