{
  "manageEntity": {
    "action": "Save",
    "entityId": "1056405150",
    "entityType": "Track",
    "nonce": "0xd6d96f1f2a7a628acfc62a97bf48f9b1c5a21dae22878344578a9c2ce0da5ca1",
    "signature": "0x95c5433fba6bfc797b3fde228c2db29e3af5580c90d959b9aa73662501ff5000671e5ab5b7d95cc5951d85112aa288ea1a27c7cc1acb96fc29665ea99e7234181b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}