{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "637372504",
    "entityType": "User",
    "nonce": "0xe05f37b6056b4ede4464de03287a51dff4a06dcb15a7c350d546f845d7dc77e2",
    "signature": "0x820f0a53d707d911229b8c4a80e63bf2f67fa2e87849b8893d047f000dddc5ce3d65fc587a6215f40a0edef3c6d4749d65337d899071dc2018403e1d0e6808c01b",
    "signer": "0x4B8960b62360073E2472A74bfbd80138387fE211",
    "userId": "86339"
  }
}