{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257465",
    "entityType": "User",
    "nonce": "0xcc5c591831da285d48cea7bfc7eb0e14133ae0ff4218f34c2e4e764cdfdf4b56",
    "signature": "0x75b925ad128343fcfa31fd9311455566d36f4bcce57813fe17fcde3cf011a709624da46f20c4f8678687e40d9888f19b3247a6d38cd0126ba391d051a3a1848e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}