{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15457964",
    "entityType": "User",
    "nonce": "0xcf45a8c0c46e436b67e31a9a064be5d9ca4d82aaee045eb8830d617bc14d274a",
    "signature": "0x1232307b69f5be5a6a64e6ac6f3c0a06011a2b52fa0a24683f1df9704aa7f3290b1257731b4910e3ed5e1bee5b066a22e61ef9536f30bc388d79143b4ee4082a1b",
    "signer": "0xa6030211678990225Ac0a6a2862549d825e7A039",
    "userId": "543439291"
  }
}