{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "323361833",
    "entityType": "User",
    "nonce": "0x4680a0fbbfcfc2c60618e66364b85e6a26ea6579e66f0d76c717b414c1dbaebc",
    "signature": "0xb9b58e69859cfdf678446c92ec66891767d318a468c6f4c3b08a12bd783a7f4f5fb35a74a6cebcaa9b4853fe7e2fd57be5b4c6cbdf82e17b859c5bc4fa31d3561c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}