{"Weight":{"*gt":50}} checks for a balance with weight greater than 50
{"*or":[{"Value":{"*eq":0}},{"Value":{"*gte":100}}] checks for a balance with value equal to 0 or equal or highr than 100

Available operators:

*eq: equal
*gt: greater than
*gte: greater or equal than
*lt: less then
*lte: less or equal than
*exp: expired
*or: logical or
*and: logical and
*not: logical not
*has: receives a list of elements and checks that the elements are present in the specified field (StringMap type)
*rsr: will apply a rsr check to the field (see utils/rsrfield.go)

Equal (*eq) and local and (*and) operators are implicit for shortcuts. In this way:

{"*and":[{"Value":{"*eq":3}},{"Weight":{"*eq":10}}]} is equivalent to: {"Value":3, "Weight":10}.