{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51884",
    "entityType": "User",
    "nonce": "0x16975fd4fd93eb539f746f1c796bc5cc713a734bde14eab775f92fc78219ec87",
    "signature": "0xbd1164c20f7a8066034203dc877f5bce23d1f4ce592df6d6b7df493b3a9342a45559f1a982be3e827713dd4173f5dfef67403b4828ff8f32b45185c785a6eb241c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}