{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x5024b64454a5873ab28300b9ad638b302c491e0a4d7f29449648ed83e66b7d09",
    "signature": "0x7c6a38bb22115e9f6cf5d01e9e5ac63b311206b898f15ba57fae6bee7049186e45c080190d197d9fb55cf4768582b8c50f758f6ab690228993276eed8afe3c481b",
    "signer": "0xa4A8a4853051b18e0f0f777693Ce34CF4bCe9385",
    "userId": "634886384"
  }
}