Rspec how to create an method to "DRY" only some params of a request?

I want to test a create method of my project, but this create method has 3 steps in my form and I want to test all of them. To test each step I need to send a create request with their respective params of the step.

The problem is: I am repeating many params in each step, I want to know how can I put the common params in a method and then just call it.

Here is my rspec file

require 'rails_helper'

RSpec.describe Api::MenteeApplicationsController, type: :controller do
    describe "Api Mentee Application controller tests" do
        let(:edition) { create(:edition) }

        it 'should start create a Mentee Application, step 1' do
            edition
            post :create, application: {
                first_name: "Mentee", last_name: "Rspec", email: "mentee@email.com",
                gender: "female", country: "IN", program_country: "IN",
                time_zone: "5 - Mumbai", communicating_in_english: "true",
                send_to_mentor_confirmed: "true",
                time_availability: 3,
                previous_programming_experience: "false" },
                step: "1", steps: "3"

            expect(response).to have_http_status(200)
        end

        it 'should continue to create a Mentee Application, step 2' do
            post :create, application: {
                first_name: "Mentee", last_name: "Rspec", email: "mentee@email.com",
                gender: "female", country: "IN", program_country: "IN",
                time_zone: "5 - Mumbai", communicating_in_english: "true",
                send_to_mentor_confirmed: "true",
                time_availability: 3,
                motivation: "Motivation",
                background: "Background",
                team_work_experience: "Team Work Experience",
                previous_programming_experience: "false" },
                step: "2", steps: "3"

            expect(response).to have_http_status(200)
        end

        it 'should not create a Mentee Application in api format' do
            applications = MenteeApplication.count
            post :create, application: {
                first_name: "Mentee", last_name: "Rspec", email: "mentee@email.com",
                gender: "female", country: "IN", program_country: "IN",
                time_zone: "5 - Mumbai", communicating_in_english: "true",
                send_to_mentor_confirmed: "true",
                motivation: "Motivation",
                background: "Background",
                team_work_experience: "Team Work Experience",
                previous_programming_experience: "false", experience: "",
                operating_system: "mac_os",
                project_proposal: "Project Proposal",
                roadmap: "Roadmap",
                time_availability: 3,
                engagements: ["master_student", "part_time", "volunteer", "one_project"] },
            step: "3", steps: "3"

            expect(response).to have_http_status(:unprocessable_entity)
            expect(MenteeApplication.count).to be(0)
        end

        it 'should create a Mentee Application in api format (step 3)' do
            applications = MenteeApplication.count
            post :create, application: {
                first_name: "Mentee", last_name: "Rspec", email: "mentee@email.com",
                gender: "female", country: "IN", program_country: "IN",
                time_zone: "5 - Mumbai", communicating_in_english: "true",
                send_to_mentor_confirmed: "true",
                motivation: "Motivation",
                background: "Background",
                programming_language: "ruby",
                team_work_experience: "Team Work Experience",
                previous_programming_experience: "false", experience: "",
                operating_system: "mac_os",
                project_proposal: "Project Proposal",
                roadmap: "Roadmap",
                time_availability: 3,
                engagements: ["master_student", "part_time", "volunteer", "one_project"] },
            step: "3", steps: "3"

            expect(response).to have_http_status(200)
            expect(MenteeApplication.count).to be(applications+1)
            expect(flash[:notice]).to eq("Thank you for your application!")
        end

    end
end

As you can see, the params in step 1 are used in steps 2 and 3, so I was thinking in something like this:

def some_params
    params.require(:application).permit(first_name: "Mentee", last_name: "Rspec", email: "mentee@email.com",
            gender: "female", country: "IN", program_country: "IN",
            time_zone: "5 - Mumbai", communicating_in_english: "true",
            send_to_mentor_confirmed: "true",
            time_availability: 3,
            previous_programming_experience: "false")
end

But didn't work, how can I do that?