{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
      "application_key": {
        "type": ["string", "null"],
        "description": "Unique identifier for the application."
      },
      "application_timestamp": {
        "type": ["string", "null"],
        "description": "Timestamp of the application."
      },
      "deviceid": {
        "type": ["string", "null"],
        "description": "Unique identifier for the device used in the application."
      },
      "fuzzydeviceid": {
        "type": ["string", "null"],
        "description": "Anonymized or hashed identifier for the device."
      },
      "application_email_address": {
        "type": ["string", "null"],
        "description": "Email address associated with the application."
      },
      "hd_score_m1": {
        "type": ["number", "null"],
        "description": "HD Score M1 value associated with the application."
      },
      "hd_score_iso_m2": {
        "type": ["number", "null"],
        "description": "HD Score M2 Isotonic value associated with the application."
      }
    },
    "required": []
  }