{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x0b46719d8c16703adc9e37dfedc5ca52db686ee3b9b40ae98f78353e78e6d040",
    "signature": "0x48eff6054c2235fe3c2fc4bc9ff4e6d8bfe79c1023435adcd733fc09a5860d7057b19755908e96219c304311dc0b294a1384e2dd336888f1e2fc1c2ea21e6d8b1b",
    "signer": "0xF468F3BA4645DBF901c04Eb471B2eDe9A63eC5e7",
    "userId": "346369698"
  }
}