{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x9d37cbabe01feb0798a1f45394595eb0b33da703fe291227038eb2d9e005906f",
    "signature": "0x099a8728e49bb02924343e6453cd57b4aace1259a76cdc100b3a97c4cc3200525fd02152a8c4c697a083fe474e16095a0b700454c5b9b1d07fc4c646e92b4d771b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}