{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x3d2641b6e6741d190e0fc0dcc89472c6ea39694880cc39f46c1c14e76135afbc",
    "signature": "0x824a68125fb3cb67d45f4097b4eb273cc4e7a9b8633de709ef76ae02cde030f819ac2e706dae369b7654fbfecfe8f8c8d0dd02c3af9637bc137aa56635f644ca1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}