{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x743c540bc328fdfd30daa8a53f3c8a837846e3013ef3e990d11128597040f342",
    "signature": "0x7ae7727e2689f9a10adb7bee7a1cabdedcc0056bce2984dffeecf810c15ef78517808165c239a728e5717d0a5809599a87485989cf66c814aeb5572ebeff2b8d1b",
    "signer": "0xF9aC4bf77f60929E1841E213DC24cB1f1A56CF5C",
    "userId": "224104791"
  }
}