{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "943839579",
    "entityType": "User",
    "nonce": "0x2251dd07066e6379b8a81e05f47f348d3e00ef4c496b65beae269c4e2ca4d1cf",
    "signature": "0x5da1edf9226f4f972744370ab958f69788055eb20ffd075cf35a236f1b0d85a523b7fb5e856920811bad51316cceaa2dfdbf2bf48b167be3d046c553f6322fd91c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}