{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "197834",
    "entityType": "User",
    "nonce": "0x1dc7c2a8e2e66bb0508fe4d5a09b05ac64d7d0074ad71000336834b218d36607",
    "signature": "0x9a8e04ff98d9da556bcdfac73c002a6e2afa21fba8aaad18b82698e4f9279f5c0813bb0de0ca8a86d81c91fa8b4a2d924bcbeafbd57d1cace5a5c40fe676e91e1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}