The documentation is a little misleading you also need to pass through the association type in your request. Can you try adding the below to the body of your request and ensure it's in JSON format:
To add to this, now with flexible associations HubSpot allows you to define your own custom association types or to use the preset system association types. More information here.
The documentation is a little misleading you also need to pass through the association type in your request. Can you try adding the below to the body of your request and ensure it's in JSON format:
To add to this, now with flexible associations HubSpot allows you to define your own custom association types or to use the preset system association types. More information here.