{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3e06682b65f4a3e0dc8419e869c6edd5731bbe958b028ab79f5013f4733ae02e",
    "signature": "0xb793d07ec0c9cf3de7062cef849e9115ee5b52bc5c169f2eed8e377043095e655b16d4a1099f2ca317d7c1ba4f77dc28e30b9c1ecd38227ec6d6230688866a281b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}