{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe75736f45bfee847d2f3699b8bdbcdb9ebef29f9a583d3696989e7a0b5cc4828",
    "signature": "0xd5bc651eff21dc68197a67d2b96ad1833e9df2c637f6da42b0a026d3e0ce7ab579f0ddea4744b11ae8ee6b0d15de6552142d03bee2b589f6333f6bdd34a97f081b",
    "signer": "0x749357e39911FAb3e69279B682aEb3f00870916E",
    "userId": "686800566"
  }
}