{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x57e420f9be7b388afbe59b67d1110e9812c2ca556a0c1ed7bbcd84e183b3a738",
    "signature": "0x2ca0b27b9ea894a2295c21668d3456ec9c638d2c82039e7d87b98710305925e501d7a095e122cb5d07a30cf69ca3a2646441ebe74bcd7a3ee5605d3b3a3e52571c",
    "signer": "0xf9f42da5842370dCa1b64D718eFB58a7729d0e06",
    "userId": "815933093"
  }
}