{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257420589",
    "entityType": "User",
    "nonce": "0x1f603936d44d7077a0e72dff663f2c33ebb91e4ac414a6f386b9070528dc1589",
    "signature": "0x940164a13a2f0093422eea85634e42cfd852a0fc5b54909ff0dfd5c0034cfe1e40ae22171efd1138b57371f635699e1133dd958a2837d076bbd52d49a891fd471c",
    "signer": "0x18b5D7Cc922Ecc37bdB131b61E14eF5240cE064d",
    "userId": "744672373"
  }
}