Altering type definition using curl

I tried this:

    docker exec -it b313002cc881 curl -X POST localhost:8080/alter -d \
    '\
    <n_content>:string @index(fulltext) .\
    <n_created_at>:datetime .\
    type Note {\
    n_created_at\
    n_content\
    }\
    '

But then I got this:

    {"errors":[{"message":"while lexing \n\u003cn_content\u003e:string @index(fulltext) .\n\u003cn_created_at\u003e:datetime .\ntype Note {\\\nn_created_at\\\nn_content\\\n}\\\n at line 4 column 11: Invalid schema. Unexpected \\","extensions":{"code":"Error"}}]}

How do I alter type definition using curl?

The command needs a $ sign.This should work:

    docker exec -it b313002cc881 curl -X POST localhost:8080/alter -d \
    $'\
    <n_content>:string @index(fulltext) .\
    <n_created_at>:datetime .\
    type Note {\
    n_created_at\
    n_content\
    }\
    '