{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x51463d8b504bd20c1eb7de8e94972a9aaeee1efdbacd23d8d538a1a9f7bf6f89",
    "signature": "0x6d1681ac8ac9d53be8b508948ed08f68c1956d17550280719dbcdb5937900411022d518c1f605ba67e03cf5eeb91b5f689c157e2f3a5afc3a567bbf194c110341b",
    "signer": "0x8838cB510ADd37b71093e4FD76B81bdd280860f8",
    "userId": "674339889"
  }
}