{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12673",
    "entityType": "User",
    "nonce": "0x123a150de07779a9bb62bee1f90b6fc0a73b965dcca91c42b31ee45e5425ced3",
    "signature": "0x40fc0728aceec8c902636ec10ff111937ace0bbb676828cea4bf9f1a80ed19c1784286462deecc6d04625316b1bb7a2c82e95533a481a26f8e6de3b6911821ba1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}