{
  "manageEntity": {
    "action": "Save",
    "entityId": "1667362573",
    "entityType": "Track",
    "nonce": "0x65c63001dedd9a237660e4bbefb5f0e48eae16f320140b4c17718ca52a58ec46",
    "signature": "0x1600781118a70f2f8de63e47ba7351b56b12d9b8f5f96e2b41bc2df72397347b77a8d91a21cb7ded265edd6be3b40b66acf02ac8c5ba4d455745256110cd53721b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}