{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf7f7faa1f4a1d27f557d97deb9d1d3b29a5eeebb4ec0fa7da4663a096ae492fb",
    "signature": "0xe8214546f89f8b19c9d6626681d8fa9cebd54a1e5d273b3780ccd58d7927b0ad38b5a76a1ecd5ddf3214ddd8d7d1eaf022ebbe696f841b426dc309807f0420a41c",
    "signer": "0xA1BE68D87068fc57EaFAfa5aeafc455519Fa0A6f",
    "userId": "16072044"
  }
}