{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "74539",
    "entityType": "User",
    "nonce": "0x4ba18f1fb1b43d39357be69d5a061263e8fc03f3478e4244cc728c824ed4b564",
    "signature": "0xb5c5f05c3d843e6758003e7c45c21accb07460c49d1e22abc5ed65c32fdd7c13031f9ff67ac0995416b92bc4598f35a82bac6f4dcc36bc56ff4ea15a551c2ed81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}