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    This endpoint allows you to add participations for a given event. See above for information of how to obtain <strong>eventId</strong>.
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    In the body of this post, you will pass the following:
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    <strong>affiliateEmployeeId</strong> is the unique identifier of the employee you are signing up.
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    An array of <strong>shifts</strong> as objects. These are the individual participations. See the /`{eventId}` reference above for details on the parameters of the shift. Note: The hours of participation defined for each shift can not exceed the length of the shift plus 10 hours.
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