{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x263cc75a6aca0791b4d5bb7328d514a5d7dbda83f47241bf7fbe42974e29a25b",
    "signature": "0x48ab724f3e94c5739cc7b87d35ea3dc277e07ad3c8916f3ecd9a4266fce7310f63a6ed1700afc33c7c5a32fc70d2ead533625a5140928650cbd80d490cec10451b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}