I am new to Activiti and trying to start a process using the REST API. I have created a simple process using the explorer and modeller and have been able to deploy this process.
Using the REST API I can see the process definition of this process.
But when I try to start this process using the POST method specifying the processDefinitionId, I get an error "415 Unsupported Media Type".
The POST API I am using is
POST /activiti-explorer/service/runtime/process-instances
with body as { "processDefinitionId":"BPM_EntityType_1:1:1290" }
Please help.