{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "139390",
    "entityType": "User",
    "nonce": "0x51a306fd957d389b23ecc6b0e84f1a6deb42a6a4301b16bddafecbfd383c8e41",
    "signature": "0x18e9a448008e34bbba2b383b50440fe6801b59c47d4cc7d4a5a47f0ff7abbc74068cdefccadb7a4f48cb4b948ce0d53f3b2abd0fafd46703a214cbac798804c81c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}