Error when trying to retrieve json data from h2 database

I have the following table definition

create table samples (
   channel text,
   eventType text,
   data json NOT NULL
);

I have also tried defining the data column as clob,text,java_object,varchar,other. I am using the following API to insert data in h2:

def insert(sample: Sample): Unit = DB localTx { implicit session =>
    val propertiesJson = new PGobject()
    propertiesJson.setType("json")
    propertiesJson.setValue(sample.properties.toJson.toString)
    sql"""
         insert into samples
         (channel,eventType,data) values (${sample.channel}, ${sample.eventType},$propertiesJson )
    """.update().apply()

}

and this one to retrieve data

  def find(channel: String): List[Sample] = DB readOnly { implicit session =>
    sql"""
     select * from samples where channel = $channel
     """.map(rs => {

     Sample(
       channel = rs.string("channel"),
       properties = rs.string("data").parseJson.convertTo[Map[String, String]],
       eventType = rs.string("eventType")
     )
    }
    ).list().apply()
   }

I'm using implicit conversions using spray and the scalikejdbc driver.

There are the different errors I am getting depending on the data type of the data column.

• For CLOB,VARCHAR,TEXT and JAVA_OBJECT: I can insert data in h2 but when trying to retrieve I get

  spray.json.JsonParser$ParsingException: Unexpected character 'a' at input index 0 (line 1, position 1), expected JSON Value: aced00057372001c6f72672e706f737467726573716c2e7574696c2e50476f626a656374f903de2682bdcb3b0200024c0004747970657400124c6a6176612f6c616e672f537472696e673b4c000576616c756571007e000178707400046a736f6e74001f7b2270726f7041223a2276616c41222c2270726f7042223a2276616c42227d
  

• For JSON. I cannot even insert data into h2. I'm getting

  Caused by: org.h2.jdbc.JdbcSQLDataException: Data conversion error converting "OTHER to JSON" [22018-200]
  at org.h2.message.DbException.getJdbcSQLException(DbException.java:457)
  at org.h2.message.DbException.getJdbcSQLException(DbException.java:429)
  ... 114 more
  

When using JSON I also tried this format json directive proposed here

See also json literal grammar. Mapped to byte[]. To set a JSON value with java.lang.String in a PreparedStatement use a FORMAT JSON data format (INSERT INTO TEST(ID, DATA) VALUES (?, ? FORMAT JSON)). Without the data format VARCHAR values are converted to a JSON string values.

but the error was still the same.

So any ideas? How can I successfully insert and retrieve JSON data from an h2 database? Is there anything wrong with my approach?