{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "641999",
    "entityType": "User",
    "nonce": "0x3db748934662a680f51cce655b88a57edce1c584acb6eacd9fdbcc18696df06e",
    "signature": "0xfb029ce73b0772e69ed3bd9d2da71fa8e62ecbc545e9d9e59504a256c7378cb660faa145a2a9b85ca22cb4cc20b6e1cbe00b78625d5669c822db232154ddeec81c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}