{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "877849833",
    "entityType": "User",
    "nonce": "0xdd9a3a2b76f3fbe4651119966ae3b7e2415e3a52539979df77e551bf9867025d",
    "signature": "0xef5be241f6238ca8f34fbdce9abae5637341fbe685d0fcbf3e6155834e1ba9911e68bb6e7c3bb9ec216dc80cd71c4415d02e8ef456a6be9dd327e4279613915a1b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}