VesselSummary, both live on the wire: the namevessel_name rather than name, and mmsi is a NUMBER{
"asset_id": "0ab8f38a-d723-475b-9505-acb844d9c96a",
"imo": "1010105",
"vessel_name": "DOLCE",
"mmsi": 319057800,
"flag": "Cayman Islands",
"flag_code": "CYM",
"vessel_type": "Yacht"
}