{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0xd4e65750a7fd174e29e6606db8d17930788e35a5a2d24401c69803bb6917276c",
    "signature": "0xcea6ea9aa4d4f93482e3c34fb4e1888de6cad4e1222cddacb4e3a1365d5765c40037e4bb4f04f13fe450b0f92f961a99c0f705cd6126d4e1703adf07c4fffbbf1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}