{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "337374",
    "entityType": "User",
    "nonce": "0xa4a3414a4f2b2cea9f79f80e273d2a0d29d2d5dd0361ab3bbe2039f0e3b0391c",
    "signature": "0x5e0496c0083c2a7d9a7efcacfb8b186ce008d948f294d584a7bfc4cfbb4c23b6584570c658a6a85fe4061ef274b55f783ccb7a849692a24613acf83d39a6c6d01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}