{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0e948cbca2ea7be297528920b7f30acafe633b7e7568c68bb9904ff1f8c7166c",
    "signature": "0x1996f7d9feb56a463d057a0c53794234660176f5cea6883d9b0210bc35cbd58d122fbd70be173c99fa1b20415d1158d8a7339a6e15cc81d0b35b9a0f1c38deba1b",
    "signer": "0xe3e4e5551A64fEaDc2a8518b64fE2fF7EB6aB2A6",
    "userId": "502392634"
  }
}