{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421774111",
    "entityType": "User",
    "nonce": "0x64ff8b3ed977fc294e3dcedee4c3c539a6e36df6c8fa19f67aa4cc80738dc3fd",
    "signature": "0x368dcc597cb971d3d69ea0b28ff2557530c254071fd5f9a1b5abc89063e252c45b9ce853eff7f7aa51a4e3326c0f3a5dcd98eccf7c1ab5569242d1ff35b356f11c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}