{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331675475",
    "entityType": "Track",
    "nonce": "0x1c3864112cd03018475be2bf31d7ce926924ebbfb25acee3090f264685b9ada5",
    "signature": "0xa458057e99cc5cf238881d101ad5e9b20e978fef02f6bba5f1ae1fa1f28f6195678cd1d9850af29de060db486339455b544b3edc59130450272e7165b22667901c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}