solo on Nostr: 现在的头像都是随机分配的吗？

{ "id": "224be3a52323f157947cc4741234bb55bb04a1212967624aa3aef955aba98081", "pubkey": "94d7d6768c09cf04e98309ac26caeaa64fcd2a0da104e9f38ffe461c091a4018", "created_at": 1675245916, "kind": 1, "tags": [], "content": "现在的头像都是随机分配的吗？", "sig": "9c55d7ba3af520ee258ee68962da1333d0daef674accd5b7a3973936dce0ed0257c2bcc7793b221a202ab793cea7ca4eefbb4358e6672d40cb9182d6bfdee834" }