'how to use the bash variable in single quotes

I am having bash code like below

'payload={"text": "failure with ${VAR} failed for"}'

but the variable is not resolving to actual value Please don't put negative as I don't have that much experience in Bash so.

bash

Solution 1:^[1]

You can concatenate variables directly.

'payload={"text": "failure with '${VAR}' failed for"}'

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