Defines the filter rules for querying or segmenting data. The filter includes a top-level operator (op) and an array of conditions (conditions).

Top-level operator:

• op: currently, only "OR" is supported.

Condition types:

• field: compares a field against a value using operators like lt, gt, gte, lte, eq, neq.
  • For lt, gt, gte, lte, only numbers or dates (ISO 8601 format) are allowed.
  • eq and neq accept numbers or strings.

Params example for a simple field condition:

{
  "op": "OR",
  "conditions": [
    {
      "type": "field",
      "cond": {
        "age": {
          "gt": 30
        },
        "signupDate": {
          "lte": "2025-12-31T23:59:59Z"
        }
      }
    }
  ]
}

Notes:

• Each filter can contain multiple conditions.
• The number of field conditions is limited to avoid overly complex filters.