{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "552554869",
    "entityType": "User",
    "nonce": "0x332a77932d4006f084dd506fe8f9a07f84f7671c7e14f91791b86323b93fff7e",
    "signature": "0x7618f50bb16a4f41735e9dc12d1c28dc26a35690856c80246c29866e0f964c8f5b7fbcd010bb9ca3bf70c0b5fcad3c0b1e7e08b845efb05399b44901d89b3fd31b",
    "signer": "0x809Db232a6131f46553BA571FB17bFA2cc58aeE9",
    "userId": "351386054"
  }
}