{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x24bb890a968e17b9bdb96f1b8a45f34b5c6902f782af0fea5efa64079672f2a6",
    "signature": "0x254eefa1fe4f56fdca1dacac7112b2733e097cfffb65d16ae7baa583d5abb1a1687bca6e6ef51cfab7fcdcd76b66ddff3c2d9c808f132bab63c23c21f412a6ac1c",
    "signer": "0x6dD74f6D783f802B225b9224084e3BDE9909b6b1",
    "userId": "542424297"
  }
}