{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "353372364",
    "entityType": "User",
    "nonce": "0x5b75cc690ed8b165fae1df370af28ab6f904d2293b0c6ec17103882f70d91a47",
    "signature": "0x611c9b4c32a094b6f21ebc8dcb46591afc45e19e96fbf98b720a1e1111dc14351a1b4d51930a4bc827fc71fed9ef25bac9a8c68df66ca40bef67626a0d1f40891c",
    "signer": "0x9b6bD4505e2bCfA88acc8680F463a96DAddf1d0d",
    "userId": "213208842"
  }
}