{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303777695",
    "entityType": "User",
    "nonce": "0x80d4fa23809d4527aff96317f4dffe6913aac73779eef7d9bab94ba8a556b8ee",
    "signature": "0x67a571e023def84eb2b92bd3ef267d90acd73db03aa2496f767f4d7462d70d44683e163c449ce18b5bd5dca905ff40d1070403e25521c289716621f05e71d98c1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}