{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "501663939",
    "entityType": "User",
    "nonce": "0x4cded373dccb0b1f6a5b8a1e35060e96be9962048136f7bf831454dd95a14bbd",
    "signature": "0x6a50a4801c0fddca054cf55ae322ff5282c8585bcf533f76f798844a90523bb22022b09277b2f13da2bcc4514e50dd2370489d1a8e27a71e191a6e52878091a81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}