{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0f6e187ac31efb518449e2ad95480e50f4ded15dc5667e701860970414d976c9",
    "signature": "0x53518843919e710f692cea2d417ff459c76a5dbd57b1dbbbe32eec59cd8056fd6b24a9763fea5c2d12489901171c1050a9ea52ee66318a82d5d01bce7f3e82511b",
    "signer": "0xC509a4d32A2b9226304C01aa2D034356E0be8fC3",
    "userId": "273063674"
  }
}