What's wrong with this JSON?

What's wrong with this JSON?

Can't seem to figure out what's wrong with this JSON i'm using to update a document before sending it to be signed. I'm currently trying to figure out how zoho works so I can integrate it with my platform but I'm out of luck.
here's my file:
{
  "requests": 
  {
    "request_id": "114619000000011181",
    "request_type_id": "114619000000000135",
    "actions": [
      {
        "recipient_name": "*****************",
        "recipient_email": "******************",
        "in_person_name": "***************",
        "action_type": "SIGN",
        "private_notes": "Please get back to us for any issues",
        "signing_order": 0,
        "verify_recipient": true,
        "verification_type": "EMAIL",
        "fields": [
          {
            "field_name": "Signature",
            "field_label": "Signature",
            "field_type_name": "Signature",
            "document_id": "114619000000011182",
            "action_id": "114619000000011190",
            "is_mandatory": true,
            "x_coord": 0,
            "y_coord": 0,
            "abs_width": 0,
            "abs_height": 0,
            "page_no": 0,
            "default_value": "",
            "is_read_only": false
          }
        ]
      }
    ]
  }
}