{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "374007",
    "entityType": "User",
    "nonce": "0x3687eb8a7f54de064b683f7e5227d2743f3ccc5f33b5a8c3b9123e4f4a99c63c",
    "signature": "0xd603b7a1829072ecc3b62812e9cf84bbb327bf1df7c5e37bc21b735b3fe3dc8b797c2563a22372471c6443c19942cbb88c146620846035640fa206a14e2beb611b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}