{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x9cf103744eb942e4e56043a12a637c221a4f9c8e3a73f285caa853d4e83db4f4",
    "signature": "0xf90d948d50afc63226e3cab8638395af269c0c320454b10fc4d03f268dd256a11cfd6559022629b15186ec910c91ed19ef15d8e4b8dd1856123123be0925fd811c",
    "signer": "0x4787CE03de21Dd66aEd548B5eE0786E8cbEbF804",
    "userId": "768321185"
  }
}