{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x102015b855b084a24adc7521ebc7ce937cffbd8891da63ea48168e88f272cebd",
    "signature": "0x069b2ab67d2674e01d31a1bb99fe69cea576f68a404f10f8d86777751c16deda544da77f022748a96851a4ea85ae18e199dd8298e438ff9b29a87071172cc6091c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}