{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc990a38bc2f54e92b30d73e1ead4ba465d8653e89b3d551dd6d0958ee7ef244e",
    "signature": "0x6c0b018c4d02d4e03f2e93c31f911e0c3a6d5f30087a2315860aa5c21145fa0505fcad07a10131922caec7d960c9cfb49972d398a2fc61700d1903810c79f4661c",
    "signer": "0xF1cd48cBD798f30E27A7f1F9C237AF81A1B14c82",
    "userId": "301966566"
  }
}