{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "954705651",
    "entityType": "User",
    "nonce": "0x66f6b1098429ae1fb4b053857b21d2f02e118cea9785137302118826045dfb66",
    "signature": "0x6ff50ed93a56a358d4a3948c5655d0b396163b54b17fd8d8082be87945e3511a7352c57757c5fdcc9440800e942a66ddaa7d8f44ab136d8fb9c00f2ade20fcd81c",
    "signer": "0x990F2c91Bb2F5E5014BcD365320De09c44E1e1E5",
    "userId": "989231579"
  }
}