{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391528",
    "entityType": "User",
    "nonce": "0x62a1b99e7013d49c0c12b6c6bdf8d49c640f0dfaf489409f0b6efb05570eb3cc",
    "signature": "0xc4641fb88f7e1e0b9b6b9d1bfa21578b5f2da0c5eba0e00a939e0e9a1e943ed32fc45c5c63fd571b673054ad7a221f1e4a35759cdafabbb782a13b25b7be7f631b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}