{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990052786",
    "entityType": "User",
    "nonce": "0x45d49e28d008107ca53aed6514fa247619e67890cacd84e8c2ecce7b7672d4f6",
    "signature": "0x7da6ce9f7d38cb51e07e8d9b4462f9bd60d2bf58ee291002beee770f4717df7e0b4bd1c64ae0c0344b599096193278c1dba8a2ad0c3c9b29547a19e3b157b5d11b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}