{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "605741040",
    "entityType": "User",
    "nonce": "0xa898fbe047b040e43ad7d61d7165654ac4d201535950d2279844a2f54e3b9aed",
    "signature": "0x9d85904e3eca0e285b1cac8f09e711c658d3f9e5f54ddff47b1666c8e04d72f23350f98e4c2710576a441515940bbc3b93969d6e815b01d29d74b14878092e941c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}