How to make multiline command in terminal?

Question

bash

The problem of writing a long command that does not fit into the entire line on the screen. It is necessary to somehow break this command into several lines. What do I need to do ?
For example, we have a team

[email protected]:~$ curl -X POST "https://google.com" -H "accept: */*"  -d "{ \"Hello\" : \"world\" ,  \"hello2\" : \"world2\"}

I would like to write this in several lines like

[email protected]:~$ curl -X POST "https://google.com"
                                                      -H "accept: */*"
                                                      -d "{ \"Hello\" : \"world\" ,  \"hello2\" : \"world2\"}

PS
I know that you can put a screen version of the transfer \ + enter . But it works for me only with the first transfer :(

Answer 1

curl -i -X POST /api/v1/upload \
-H "Authorization: Bearer <TOKEN>" \
-F "[email protected]/home/user/avatar.jpg" \
-F "type=avatar" \
-F "target_id=59a46a496964ab627abdff70"

How can \ + enter not work ?