{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf2218493e6c705ec0ef13f6d0cb517316a00044c42c2a063018dc141d635e6db",
    "signature": "0xbb669efd2ed27f78d15c0a6e3dcd5fd4889fff7c64b4fb96e5a4d8b8544937b514ae30935d5b51c86a4a0dafad647393072f2f94acf61cb8169361f680d8f0591c",
    "signer": "0x48F749768Ec978f5359271bc1Cd91492008084B9",
    "userId": "670646892"
  }
}