{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540848139",
    "entityType": "User",
    "nonce": "0x1651940306304e9c7480389227e5995fab8d224473905e45a22febad3d936831",
    "signature": "0x3591bb854aecfc7a0bd01d488a9fe041a0cb5f92ec0638210ba67b53b45867af3673240c5aaf351ebf8882b6eb5952e1740f83f2e4d39d5cf3733132b4cb55cb1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}