{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999692142",
    "entityType": "User",
    "nonce": "0xaebbbb5c8b7943f839fe2fcbb57eb62db45d2809dd3a38d99f9e183062375ff0",
    "signature": "0xfc4e0a02490936b84c8c4f351e234e4cd7cd23f3b4ed369fdf21912745e8f2c53871984e0058ea37c2c2f3d34ffd3f7271b69abe1c003f28245e53408a6ba91d1c",
    "signer": "0x21370B7a703524cC2941323C2c960224021F8D56",
    "userId": "986168993"
  }
}