{
  "manageEntity": {
    "action": "Save",
    "entityId": "1921863205",
    "entityType": "Track",
    "nonce": "0xa8c385e0d9797436f704a7c182a3f44ed466a64b4b145aedee7a19f64cbb82bd",
    "signature": "0x703cbabd01c6366c557a757077e48ef2d11afa361ea8aeb57f9e2d4d507f3be245da8afdfd17407acb1e1cb80adae057a10d38a595c0fa73387bf18fbac36c321c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}