{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x672299608c4c69109d4ef5c103f2d780f7092f7678dfe3c0c0de0c5aefc120c1",
    "signature": "0x89bd3fc6483ea0bd76b526a19af30c11c333029ec69356f0df62fa3abef13a9505fa2c721366ec0aea9d564735e8d6534d51ed959a222a807c536350a32590361b",
    "signer": "0xE18f37f193553F7bFB76f10C386b65159Ae304E0",
    "userId": "4510"
  }
}