{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121201250",
    "entityType": "User",
    "nonce": "0xee97d21375d685a21d2742aa0456dc598e3ece1561afe3c1f15db35f81334f61",
    "signature": "0x7c0e6e7b6ccfd141c7e308bd752369ed69b0fc7d29c6d6f1871baa02bcaca7d95e991a4f2731852b64252f08b4f4a8edf6b0145e533a4331d1d9188aa54f49251b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}