{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "449173",
    "entityType": "User",
    "nonce": "0xf331c47e4d3a789adc215db04c49587d6b55f2db5d898609c947bad29221f84b",
    "signature": "0xf3aaf437345c7998c5846a220d38d29f12f5c90012958f3a47592018084683e44e9f5dcd385572379902589a5c75bf59409ba8da01da6cee188ee3f826662be51b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}