{
  "manageEntity": {
    "action": "Save",
    "entityId": "161876",
    "entityType": "Track",
    "nonce": "0x95ff3c0f1ff43b4e404af0db8aa379dfbdd8906ff2c4275b6921ed72869083a3",
    "signature": "0x210506b0af4ad3bc06bff67310126f11f429f1bfe7ada0f98271ab054dddc2e146ca8213fbf9baddb2db56ad0fe7c3a4e4f07a9c736737a196fac04a2b7426051c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}