{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x4bfeaff1000a6890bc36febb7edbbfb9daa22e45500355ad47b0f71cf2daf319",
    "signature": "0x8bb29d42b870c02772feb607b108226e7b339a4d058b24411b9b6c9bb95cae951ae249f787d3baea0d64981e9f9fcefe3a7770b320d4f7ad0a35972cb47f89261c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}