{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "449938034",
    "entityType": "User",
    "nonce": "0x60705425a5be157ebae2ece8368ebd5b6a2048dde62b63a54e5e7b52250d07a8",
    "signature": "0x438e8efcc93ec33070e9e3819f15f781e61b91e8887c2f67780fb544e64f833f3b95370c7c1a98cc7e3dbadff470ddd84de7e46e0c6b257a7fd579692d3319db1b",
    "signer": "0xDE3686894b1BB7886D5a1995730930c47824F3e6",
    "userId": "323456"
  }
}