{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "72157",
    "entityType": "User",
    "nonce": "0x756f784cda0c0a38269daca695f888aef45d86a4cc682edc4b0f3d5f57591e37",
    "signature": "0xdf6b391fedfdcb9d8f82f0adc36a583879df52354c66e3d8577b8494afc4746620877ea40506ad1c2a30d14db708c3dc32ec6df2552ae37f66723be11467a30c1b",
    "signer": "0x8D3Cabb7A85dCf573e6112D7FAf1dfD727a2Fe81",
    "userId": "878616439"
  }
}