{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4556274da1ba330d5b7c90c95dc3339d11dd1a352f651c267b38a62f69121863",
    "signature": "0x8c6b07c08acfef5fb22d494dd5d40ef2e05890cd36f0c25ae260e569664dd4b23c37bd621e67b2c84b3afaedbf2c4c1961f04e6325f7f02fb5bd492523800fc61b",
    "signer": "0xd9d4cF91e1f5AA6f2F8599662a7c9b5896FB2a2C",
    "userId": "289632107"
  }
}