{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "666568813",
    "entityType": "User",
    "nonce": "0x4f35f7f88dc9622a9fb731f63748082a88cfc0ea002c4e43662145d81735f19e",
    "signature": "0xf1f8de6853d681a14118030223dc81f977ad777ddecba6ec398d07cffb2d42dc1d47025a800c4d7628e7c9e505a40950fe16e03d623893d488e4ae04f21545891c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}