{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645202292",
    "entityType": "User",
    "nonce": "0x92bff52fa2a727d8b39f5f022420b2b10e02d0f1546a4f485ee4508f29d89efa",
    "signature": "0x7380d48f454282190c512fcc55485646ecb378b286f2d60e5c95a831cdf762c879a54f875aa87b0d5b93f3da3ad04852a6a8e6ad9a8814c6efca21eb811a9e0e1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}