{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0b92de656b1ef75904c3e0a35603af12416429d42c66dbf73e833d74cdc090ed",
    "signature": "0x01091469adae3e6f839d183ee34ccb64bd18ed80116a49955262ec3b0ce255106d06449d5ed83abd7c9f33a453e394fcaa24ad2bebcd62fa426ec699214abf4a1b",
    "signer": "0x78294000CC90cF114Da7F3C803cDEA075f404c29",
    "userId": "990710021"
  }
}