{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "520365335",
    "entityType": "User",
    "nonce": "0x53e32e49a42c7e2a5352b82ff9667a75ff69f123d331df6f63b8a2996f974bd0",
    "signature": "0xd52ff19e1a23fce67f1f3593cf84c8bc66628bc84b24c2e361acab8a5b4754391cf6e6b0eb43c9b35bec8c0b52e39c432ab1ec0e5ac68cf425cab7b06282281a1b",
    "signer": "0x3CE307cb27B2Fc2b03Eae311050CA4e8C34Fa57d",
    "userId": "50936"
  }
}