{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "745004514",
    "entityType": "User",
    "nonce": "0x90685053ec3dc078672e2f4a3240648a893e5738db0548e9ffb64ba74d218ccd",
    "signature": "0x1e404bd8ff99a18b5e0f4f417c8aece8de50f8f0712bbb20902d1a54d5c6efe542822e9942765157f7ef3ab135c1aabb57f15eecc37ae8e7a9b0bf73bcdcff101b",
    "signer": "0x0d0E0D19797534AEF52736C60B52793E9f88e24F",
    "userId": "603294620"
  }
}