{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728328",
    "entityType": "User",
    "nonce": "0xf39ebd14d15838b520badd15b86a174dade24054636dfbf9d7e2150fd198d362",
    "signature": "0xde965eaac07da44e09e1a998cb306aedfd7f5909f10ce2dec1a66345469875557bd29553dcfbcf12b45a7af674994a4e4053da63e28a688b5c8a1b5133320e741c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}