{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0xe38847f8a6719bcfc9322fbadc1e9f15ed6c453bf44d88c9bcc0b7b92452481b",
    "signature": "0x30d95cef5f92ade9e82d3f41a6ff85fb1fe1e1d009e63a6bfdb68c3394ca805c09be8e8418655bf1350653c880bd367db7364759c94a05aa8a07501cdcf143811b",
    "signer": "0x4950A7c498b6c214e83B79502162b7f248f9e6ed",
    "userId": "499895630"
  }
}