{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1873428",
    "entityType": "User",
    "nonce": "0x193a1e026021ea57cb2e34fd9653a9e8bcaee6c549b7eda5c6317c5cc9a037e4",
    "signature": "0xfff98cc9bf35f9cff53ef1f3cc9d15d18607b4d1faadf46aae03bae9b356380a6c89d0c9b15e09cbf221db28a78e8b6ebfbf32978f49b80dcf48cbf28b9f69801c",
    "signer": "0x21e530f5EA8E24d2476C3Ff8253D151693719385",
    "userId": "854449345"
  }
}