{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "254187418",
    "entityType": "User",
    "nonce": "0x8251f3bc6b28baf5d3a85f0d21aa9413cb2ee34e8d85aa7d17bcc0141248d653",
    "signature": "0x9a1de524b16f9d7e61e387ef2ccaf97aae8e815b8cf2a19e1c9b75014f309fb05d82adcc7d023ff2af6184721a9b04d30ea86194eeb6e536f17be1325e4a59b61c",
    "signer": "0x3B15C1247a5CC34F846b88f0E04B262f39b05C1e",
    "userId": "563285188"
  }
}