{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "489165782",
    "entityType": "User",
    "nonce": "0xb103b69cc86bcd6ec61583e5f373ed378323e1c9a6eb6fa8ce4195ab5f85b143",
    "signature": "0xc81ff75a59d9982674d0407aa5bddc70ec98bc55eca407789f8205c4f5aa68194fe58bd1150000e0880f1bfe07c3a3f1b1a94bbd6032b97a3bbe574b2d0ddae61b",
    "signer": "0x1912FC6B7317125d52bbb01C67381C923FA92aCe",
    "userId": "763473"
  }
}