{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121201250",
    "entityType": "User",
    "nonce": "0x3a474f50babf593ae1cea499c55b075382c10e5c9f85f0ae200f59dba63ce1ba",
    "signature": "0x9b6ffb817cac3701ba2f5c842fa0ed07569636125d14e526bd49e53bd0ac93915beef3279ba4f92333b7a50269d6828443c0d85d2497df57d3d3bde2658bdb8b1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}