{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "446645802",
    "entityType": "User",
    "nonce": "0xc4e338ca38c1a3f1c97162aa68c37bea6f37e015d34eb867131f88dce024398c",
    "signature": "0x89d2ed387f8d7824c51cbc2e6e2e9add4e49e471290dd11cbf15ef5c8fd4efe2460a9a62eac247c62e2b930c40fe9dc95a3d1afe13240dd5f7180c2a885ca8021b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}