{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51601",
    "entityType": "User",
    "nonce": "0x75a0eb464e65af55fdf8c79fb814169f5dbb0f97a001d41ee298065b985c469f",
    "signature": "0xec9a0749b98f222ab26d49204890644cb244d00e8449ccf861c25bb2da5d47d41408345d020b727583ca4def35e124ac5617fae713dacbfc581e25252558e1531b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}