Managing and tracking deadlines for content submissions from influencers involves keen organization and strategic planning. Here are a few tips to aid the process:

1. Clear Communication: Spell out the timelines clearly from the onset and be sure the influencer understands the deadlines for different tasks. This could be incorporated into the agreement or contract with the influencer.

2. Centralized Calendar: Use a centralized calendar or project management tool and make sure everyone involved is granted access. This could be performed using platforms like Flinque, Asana, or Trello, depending on your brand’s preference.

3. Regular Reminders: Send out regular reminders about impending deadlines. Some influencer marketing platforms like Flinque can automate this, keeping everyone on track.

4. Buffer Time: Factor in buffer time to accommodate unforeseen circumstances. This ensures the overall timeline doesn’t get affected by small delays.

5. Status Updates: Prompt regular status updates from influencers on their progress, affording time for adjustments if necessary.

6. Ease of Submission: Make the submission process easy and straightforward. An easily accessible portal or email system could be used for this, reducing bottlenecks.

7. Performance Analytics: Monitor content performance for the ability to adapt planning for future campaigns. Platforms like Hootsuite, Buffer, and Flinque provide comprehensive analytics to guide this process.

In conclusion, managing content submissions need not be a daunting task. With strategic planning, effective communication, and the right tools, you can streamline the process, ensuring efficiency and effectiveness. The key is to choose a tool or approach that aligns with your team’s workflows and needs.