{
  "manageEntity": {
    "action": "Save",
    "entityId": "1811669564",
    "entityType": "Track",
    "nonce": "0x1dad232156304bf32aeee62c34d0158314c529a34eee07cf9a87a68a755dd8c4",
    "signature": "0x2ca40278dfbd82280121067058a4fe01abaaa0ed699e7070af06ef59e7e2372b306b4ffe4388d5c30ab9faa68246e461168b28f130a1c03e290c058c396a77ed1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}