{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0135fb1475dd02a940aec5f07bf49329cd23f829e42a9e50724354f70dfcf0e9",
    "signature": "0x69c8ba31e436d7545a5417e3a2f4b39c0ea9442a8b3df11926af9eba777e59c126169b5665b4ba5f5c785c121c3287b7dfa8de36c3952c348ea1be4add5cd8cd1c",
    "signer": "0xaaa210BdF97c681107cE56847557Fe8137107B08",
    "userId": "560013778"
  }
}