{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1ba7e5b8b0ca520ec6e89e6dc2fa5325ca3cbab7adaa7ed42efc8d56da4cd36a",
    "signature": "0x4a42a98186e8b4af795887bde65bc55e17752ad47e80bfc1d42a8e6096b7166b2738ae38645064d64749a006c764c196b17a963a77bf901c08a7a7d312920afd1b",
    "signer": "0xA90D583f31199FE1F2d12366a70167A343A9F16D",
    "userId": "30424862"
  }
}