{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1450501",
    "entityType": "User",
    "nonce": "0xb5930db464e61f6335a35e1741cbaf42e185ac1877f4193787115edfa620c050",
    "signature": "0xd91694332d296618319580a3d6ab9c7194d7c728c4d4973c65b865091e3b998e2ab970342e5288687ecefab3180bc7c79a208af4a5fcd380b6a7f4aa878045e61c",
    "signer": "0x1C91270aF9483550C16389c0d10F0a9e72fAA407",
    "userId": "451779920"
  }
}