{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "669480134",
    "entityType": "User",
    "nonce": "0x111f43a6db4a6e0e276684534cb378a85886cc6ddc7b8e344d64b27ba8ce87d9",
    "signature": "0x68b91e897f05d3d8afd98f2f04c540a50bd41681a3cd68b3e67898ba5539ce8b4dee0dfd092422ce7a8e7f7c58be180e0136ce1fda20512f105cd48be52d32821b",
    "signer": "0xcb0dE1B9981e7D13931d9DDcB14a7597369392B4",
    "userId": "121885"
  }
}