Workorder Procedures Steps StatusId update

Which API is used to update the status of a procedure step?
Is it possible to upload and associate an image with a procedure step?
What are the valid Status IDs?

"Procedures": [
{
"ProcedureTemplate": {
"DisplayAs": "DTW - Escalator Periodical Maintenance",
"AllowMarkAll": false,
"AllowNotApplicable": false,
"BaseId": 54223,
"Summary": "",
"OperationalRisks": "",
"BackoutPlan": "",
"IsRemoved": false,
"ConcurrencyId": 6,
"Id": 4383
},
"Steps": [
{
"WorkOrderId": 611573,
"Index": 1,
"Comment": "",
"Description": "",
"StatusId": "Done",