{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xb7953da892d13942ef663e99a2fdf3a7bd580da03e6470f2312f06d6968a2760",
    "signature": "0x4941349d60140465b6c675512f113181e804707912377bfeab6dfd2a6eb064b05d70163ccc2a80f58fbcf9032e79f37929542736d9369c48d4119e4ccdf9c9881b",
    "signer": "0x6e8091305075B855672CA0d738FbF17D4bb8d54F",
    "userId": "639306401"
  }
}