{
  "manageEntity": {
    "action": "Save",
    "entityId": "1920836444",
    "entityType": "Track",
    "nonce": "0xc553ac06335426e15ebe68d390cec26fea5cb1544d31b0eb27a6616f56600254",
    "signature": "0x031a78d71f12efeba27603d82c8d487857d75983b4dcdc4c3416935fdf74cc5d0bed5b7b4aa4a20de886327e9629f1f54cef2cf70ab4c1f10519c6a04216b74c1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}