{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xeedb56be6fa4ecda156db022790ffb178e934e68572da731da170ac589be767b",
    "signature": "0x1b74c466e605927d32a6d317e36f9ba7d8a12d8700bc0c4b7cca87b75f81339772b5fa515325b2d509b718033f18ceed8f20248bd73f041419093dd7fe8776c61b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}