Send multiple parameters in Scrapy formdata

Hello, I'm using Scrapy to automate a "query" process on a website.

After logging into a site, using FormRequest , I need to make a new request to send several process numbers to the site.

I'm currently doing this:

 dados = {
             'sessionName': 'PROCESSOS',
             'sessionNotice': ' ',      
             'contracts' :  '1234567'
         }

            yield scrapy.FormRequest(
                url= LINK ,
                method = 'POST',        
                formdata= dados,                
                callback = self.resposta,
            )

    def resposta(self,response):
        print("DEU CERTO...") 

Okay! This works for 1 process, the problem is that I need to send several, so I tested the following:

PROCESSOS: "12345\n54321\n132456"

And replaces instead of formdata in the 'contracts' field, however, the site did not recognize the contracts.

Inserting a manual query, the formdata looks like this:

  

Otherdata:Processesareinsertedintoatextareaandare  separatedbyinsertingoneperline.

Note: I also tried to use array.

Note 2: The request does not return any errors.