{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645058",
    "entityType": "User",
    "nonce": "0x03d93473547449f67a16dcaaff4329d2d99339ec308292d75d6f157119166ffb",
    "signature": "0x7383b2d5ea61dda5e8adcb40132224bc78e0393efa71cea6d96b8d73f135e69a49d2443b9aa61554234941b981ab57fe011a357ae2dc09d6646e83810b94b9f01c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}