{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354441",
    "entityType": "User",
    "nonce": "0x4dbd4c35becb8c8580af7e5be627706f2774f1e123c9a834032bd0a919d16d85",
    "signature": "0x54098050d42a7f24a9352590912815adbfed847d93a473e10db9aac6850fa8c55a2064c236da04d714a59bfa0e6ca89e58d2691717f5545c6d4693cf0e40cc6d1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}