{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "637138972",
    "entityType": "User",
    "nonce": "0x1538fbc89948fcbea06bbdeffc08c86cc5e74d6ce93e4a68f3248b649b509348",
    "signature": "0xac2584e4dee78b5ffabcdfb44de5115d7679174c34720034da73256638f5d8524d3f443ba885c06ed7894422513225f9698259428d364367ad468c00bc992f641c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}