API payload in camel case

## What
We need to improve the schemas to expect fields in camel case format.

A solution could be adding an alias in the schema fields.

e.g:
```
alias='coverageArea'
```
## Why
Because the API payload it's in snake_case format. 

## Tasks
- [ ] improve schema fields:

## References
https://pydantic-docs.helpmanual.io/usage/model_config/#alias-generator