I think it needs to be claimed in 2019.
You authorized your 'agent' (the management company) to receive the income. That means you had "constructive receipt" of the funds in 2019.
From IRS Publication 538:
Income is constructively received when an amount is credited to your account or made available to you without restriction. You do not need to have possession of it. If you authorize someone to be your agent and receive income for you, you are considered to have received it when your agent receives it. Income is not constructively received if your control of its receipt is subject to substantial restrictions or limitations.
