{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391880",
    "entityType": "User",
    "nonce": "0xbcfe4085fd18e4bcab0ae8a4b1a1d9e6d9838b89c2825cf360ea7c738c562e7e",
    "signature": "0xe04da4ee8d918a8642e37d95240c01128bfbeed2fef394863cfed58478c209dd5e323915ef781cc26b023490d07eec56803d65748840c9e38e3cf9c81e90d4371c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}