{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x21b7db8b47e14f61f4cbc2004b62cc6c3494eca02a2f743fbc62eced9c80a3dc",
    "signature": "0xc1479d426328c108d65370619e1cb857da02274ebd5986b7881b2c60a062486854eaa6c18eefa490b97afcf401d3835d404d16f79e7cc28716dd453aeacc84a31c",
    "signer": "0x2752c6C488Ef240895028c3B2287EeC269C7EC7A",
    "userId": "79019982"
  }
}