{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0x8939d4e2662ab88d8b610918b7c125cc12341d4738e58232090f6ecf238bb989",
    "signature": "0xb1c7bc8a10915dba2a769c20d2ce02263399fab437a44f492f7e23030317672f4d8e58cb79d389ba14cbd20342138c0a927c84cea2f37730054a42e59082d0b31c",
    "signer": "0x858Be7885D181415aF81b736714608bbff4936d2",
    "userId": "357460890"
  }
}