{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "818575604",
    "entityType": "User",
    "nonce": "0xa14e3e98e8a7a569732c874f4cea5b06ab1b8fe7b0faaf2bcd9e87448202302a",
    "signature": "0x21a2eb4ad52d77ae998979548843ae3b906caf1c7efb3d6f7cbe9014c34b65c254ce35bfecd33718593e5799a95686cd014f9d47f9223f600d87a6f06a0c9d071b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}