{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "37200",
    "entityType": "User",
    "nonce": "0x217fac57b714e438b4b87eabc7ed661353a5063d53130bf4cfc75f6a3c9c6e4d",
    "signature": "0x17f3c4d60922aa8e46bf7ea7f07ba786e2d9cba7a3e3393dfe7669097e57ff6009c20cdd7bb00040f5c606b80e0b5f6c72d971890890644fbeaeb886b7eab0e21b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}