{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42521",
    "entityType": "User",
    "nonce": "0xdbfa61ba410726f5aacfd4c75e7a84d300dd083085733a449e25172d5c2cedc0",
    "signature": "0x1f34e1b989cc584cd3e2a75ffe34f63839db67237eeb4aebe9e6ff511601bb511be5858c87ebadb6c9df63fbb96f3af29740d3886bd4ebd1a1febe0755df2ce21c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}