{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0x5f21f4dd381f3b789b88a8a23d975e494ff7c73bac5e786708d374ffdb58caa1",
    "signature": "0x4b573e12ebedd06dce87f18b81a33c5e9e55e58ba3f5eddee2437755815eb9ac18ea447fccb1f801f6b0eee4e86daa56df103f2c343aee49dac15ef3c4ddb5fe1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}