{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1721",
    "entityType": "User",
    "nonce": "0xfb6c0516f0e83051a8c2db7f09da1b184ff8d01c1bfed9f89a94b9ab7bc3af94",
    "signature": "0x9153d46b0cc268d8839cccddce2e174c775aeb52fad9ed5f65724c71a4afd7e506082c0902103db26bd71d0bb7ec290dd235931cf51ccb84489ebba885c4ff4f1c",
    "signer": "0x44577d90A171E208f723dEEa39019067c9Dd87E8",
    "userId": "853591809"
  }
}