{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "549950943",
    "entityType": "User",
    "nonce": "0x1dd2eb38341e5b45b44a27587a9fb5ff79d32fd132e1fb59c82b3ed05fe17d1f",
    "signature": "0x53073a26cca9865fc96d99ab7ff23f7b9b3ada76e8a460d2436b0cb550b604ba0eb8b379df2a51bed6e7dd29f0a247efe6af83f6f879a683cd489ac8a1622d121c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}