{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1440611",
    "entityType": "User",
    "nonce": "0x55ec975b2a0903f425d56033816ba08e5ace6dddcbca1c870274af43b46dccd8",
    "signature": "0x514896ca363f19968761ad2280ded7e12d207584292c3dbd3ed9b5baff7c334202881831ae9231968e98a1655bf8e30f4220aab638fb8a16b0ed5d91703cc35e1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}