{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x512c68c06e15bc14c4afbabdc6086265e9a1e63a3921c95a93ab2ab4f4de341d",
    "signature": "0xf99af147a1df2ecf13a363fe3d5ca78f0925caba2151a13b04827dc63304d9e46f986d1b6e560764d4c34d43b9645377830b16b3e138107d7943d9f4d16d8fc61b",
    "signer": "0xCCA88a6013df58bb68F420Ed2f4a3d2ac0C7405A",
    "userId": "322306"
  }
}