{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x557b18c662029baba5a5cb2e9d0291981a437d3fd48dad0b77ddf62366a007e3",
    "signature": "0x9198ea8a955d414deb7eb65c43a155dcda69fbf706738e7df3142fe4ee4991c0009f25f89d0a468eb39ba90683073e50b9b12a8acca901751581430ce4eb79e81b",
    "signer": "0x9d5d1f1a59bB255396F7F1e7DeB307A4F66f15ec",
    "userId": "429311703"
  }
}