{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x872c4e4cde875339925fed15680d0031966e27f985b45c334627ca6108aa6c81",
    "signature": "0x4848e8bb530b99fd54a2de6bc885815444908c91942e685c9935686b8f33734f727c2e6eddb13c81e096cb2e695bb79ab04f378b07fbeb5c193cef8d08b6d6e41b",
    "signer": "0x81f60DEAd0cdA833Ad17fe7Ddd37b36E62630205",
    "userId": "132087202"
  }
}