{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9397c5351413a9fc8f9bbbe3abd83fc0bcdb3cf6b353a79d3ff0adb15ec96503",
    "signature": "0x7e986d2f2471307f8893d6427b08ade272b8b0efd65a84ce7643bfa84b8409782f7838b0eb63f54bd0751f4c1cf6d901acc16786542d051f6f6ffd2e20f4bb871c",
    "signer": "0x4E683ed70DcfbA9b223E24954Fc9c366C86a4228",
    "userId": "399689337"
  }
}