On Chain Data Structure

{
"type":"ordinaldomains",
"name":"london.btc",
"first_owner":"bc1p5jfrr6ay9ghtrrkv604qeh0s57y88m3dj3slu7e4u82hw0zfns9q65jngy",
"createDate":1678271540546,
"registerDate":1678271540546,
"expireDate":1709807540546,
"sig":"3045022100827f1826ce28d87e136ef5e672e1be4474353993d76965b86c7b0797f25253000220153982c31c2ea3f46690c4015dbcabac449080d65938a14e0ca48f32dc902f87"
}