{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304921883",
    "entityType": "User",
    "nonce": "0x1990b87fd5f71fc87a138c71a7c7445c0991a125051b9d9d6dad16a7d86d1071",
    "signature": "0x4c9e77e0da551de5c259486f612cc64d86a69710050c82b3a2e61e6d835e11851bae91ea1f7db2c5405501ce93786ed4e6c54aaf01ee85b3b4d5f904d3572c211b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}