{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb54327780d16bc4db2d4bf17c8706cfa80de321cb36d8da90da2708b09f38d01",
    "signature": "0xb1ed28b704047f4aadcea7605d9c9ca29303fc80ba25570a8cf8c04a502f8d196b270d159361bd69edf76f18175b600bb27318d60663b26d168db021341b1a641c",
    "signer": "0x424b8Df5989875ef5215DFdB54730e493002E0Ae",
    "userId": "548196171"
  }
}