{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "475979959",
    "entityType": "User",
    "nonce": "0x51f25ca2b69e7f01a9a4e174127f32f619126855393ea3489cb273611f6866f7",
    "signature": "0x81a6c28ec243e40a3a799739c314e89d01b65084787ec65719162c23baaf18f0694e7e36d952f6be5111fb36ec1ff2ff728675c3a9b2414a57aadd60478ca24f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}