{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "549940553",
    "entityType": "User",
    "nonce": "0x26c17cdb2e4a4413f3949aea84faee0310465f6dc85bbc28bb3194545f19c9cd",
    "signature": "0xda029bb3bd7b90c4d71ea2e3bc400634fa7abd711d226aa68243d9ccc7c22f173e53554dc496ebad5961a85e76a1e380ada3b0fc7eaffb7657d644fba440b5e11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}