{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "407339",
    "entityType": "User",
    "nonce": "0x5b831f6ba12132270025ceb33a720b0ac7c051d5c5a74dbee85054865c271890",
    "signature": "0x578d3728712fcde48c2fd57a224b0172abfa92ff950f75a2dac0ade6e7466dbe595697a3dac653bde829ab0db97ff95a866d4637f86fc07247a1bd65afa224c21c",
    "signer": "0x18b5D7Cc922Ecc37bdB131b61E14eF5240cE064d",
    "userId": "744672373"
  }
}