{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "752389",
    "entityType": "User",
    "nonce": "0xff965a35d0d8c0fa0da3519887165e73c4a5adb815fddabbd46010c653da5415",
    "signature": "0x875e2cf51491bea97f33d538e5249e5f336e297dcfd0a66407215ab06f4dc0806287221cd1b9def824b258fb0d500794e2bd6cd8408487447df394499f4a37671c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}