{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2b7d1e4d23b1708b041ba78b5846b4734328930de95e3db1feea99c2e310e88f",
    "signature": "0xb6174e4a9a69a6e9302699494bcc848eff1ab48ce3e4214a471eb1f03033b2b709bdec66970cfa4f10e9f9d7afc3490748f3ef577716a68f35ff4433eec897ff1c",
    "signer": "0x28b9f9197fB6fe7356F4228d71DCDD1C6aA3C8c3",
    "userId": "252398720"
  }
}