{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9a16f71671725b633e738e9ec92403792a7005d653de929b76ab5c636ce8132f",
    "signature": "0xea557a7776d0d179e2fe0ca1a1805e2aa21d8cc78a89d880a7524bc353f1d5db3e453f36d7cb1f12b70e02432366da75545850e7d3a01be52b5dd66c5711b6041b",
    "signer": "0xF54ACD9868e9906094BBEe9817413658a3Dd38A2",
    "userId": "399415777"
  }
}