{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3374a1952db0043d8b026c7af427bad483fd7023ed0cf86d58d278fbf15a9a66",
    "signature": "0xc36faf98f32367b9a07d75f02306144ce5d59ec5fa91d13b2ef6b0b6f0aa53635c0b4209792ec7ca7bbb6cbf446fe794ea72126aa528f675d47811aa667f379a1b",
    "signer": "0x991551b6644915E25B44A05415b0a3a2a3408DCC",
    "userId": "199068976"
  }
}