{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273007816",
    "entityType": "User",
    "nonce": "0x1e97a5f5f92d53c8a7f03b61f04f8ff7fca010c2cd69c34e4d8205955326c03f",
    "signature": "0x668faaf9a0d6363eeda173eb8ce631af0a66c64acfbcb89ca56964446a1419a841dd8627e78a6859cb04c83a76511f7eaffed0bffa89865eab200f7edd80e9561b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}