{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x9556e9f4c9906d7b8a165633ea88feb8c5b4b8883abb90db5bc15a19a0b75810",
    "signature": "0xf2d51110fce4873686f73a040ce0fa3199a00a04ac17cd86c467941d6ca8ea3877f0d868073fee123ddab686cd26b378e2ac2e6e9da7c9c6b6ab3427a58a30ad1c",
    "signer": "0x97Ce19D122F5b51231cF4DBbd25Ac36CBDd6CACa",
    "userId": "426864186"
  }
}