{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "898597348",
    "entityType": "User",
    "nonce": "0x95f9b42d8696c0c3e726c4f47dd5b4675f531ec3e5a76ecaff0c745992658223",
    "signature": "0xaa10979ff8ae9cfd26554ba399f6010d8914f58649569ca99e07680580b0672e4060f5f75f0c31b84381bcfc2a67e8dd7efeca7ce4455ff4dab70208775cd9021c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}