Trying to send POST data via salt-api curl command

init.sls

#file at /srv/salt/createDynamicFile/init.sls

{% set postdata = data.get('post', {}) %}

createFile:
  cmd.run:
    - name: touch {{ postdata.fileName }}
    - cwd: /home/slimmons/

postdatatest.sh

#!/bin/bash

curl -k -sS https://192.168.0.172:8080/run \
-H 'Accept: application/x-yaml' \
-H 'Content-type: application/json' \
-d '[{
"client": "local",
"tgt": "*",
"fun": "state.sls",
"kwarg": {
"mods": "createDynamicFile"
},
"username": "myusername",
"password": "mypassword",
"eauth": "pam"
}]'