{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18723",
    "entityType": "User",
    "nonce": "0xae7600a053cfbdd94667f7a9bfdb56a163facadead11e4fe6ed1a97c0cafd4e7",
    "signature": "0x0474964084acedc4d58b9af959234def3f39a3dcd8e976023825e22649c742502834ec62d1ff229c6a0b033577c4b863f8b926e46e2e6bdaf45983152e4641061c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}