Who can Perform this action?
Admins of 'Echo Content' business on Facebook Business Manager.
Steps for this action:
Go to Facebook Business Manager.
Choose the 'Echo Content Business' in the dropdown list.
On the 'Users' section, choose 'Partners'.
Press on the 'Add' button located right to the search bar, and choose 'Give a partner access to your assets'.
Paste the Partner's Business ID.
On the Assigning Assets window, mark the 'Echo Content Pixel' (under 'Datasets') with the 'Use Events Datasets' permission and mark all 27 Custom Conversions (VV>) with the 'Optimization and ads reporting (Suggested)' permission and press 'Save Changes'.
On the pop-up window, choose '{Partner's Business Name} acts as an agency for my business' and press 'Next'.
And that's it!
Now the partner will receive an invitation email to approve and he is all set.