{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354441",
    "entityType": "User",
    "nonce": "0x875449bc704a423b5bb0f44d31df7729f433f9f10d9bb86aa8e4bcd5326425c5",
    "signature": "0x51d82bcdfe1ae47d6b32d1c7abaf4417c6c386c878088eb0bdc0cd7949c2a26a6733dbd1ad3b4d35c7b7e2ace83d11536d153c4504f51cfb919f703cdf2139f91b",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}