{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2921bc0e53abef4a468212dd60b8a1b7732a4ce1451a0cf3671a2a66562aa107",
    "signature": "0xa2af42c3841e88a9f1bc0b529209cb27a193baf2e46382e48709cfb5dfa765c51740409096ee4daf37c9f33e06d1bedb8565d984aeda910668d348ab8f1f04471c",
    "signer": "0x5dDb7514dB99Cb75E7051C637989A70F1B49843C",
    "userId": "239704741"
  }
}