{
  "manageEntity": {
    "action": "Save",
    "entityId": "839692982",
    "entityType": "Track",
    "nonce": "0x13304f47d36cde02b70e593c832067920596ac575227654b88c6054451ba0116",
    "signature": "0x4e93b7ad2915642c8b3ce4f285a35e1d1433d5095c73b31159465919f71cb65a4a1bbca8aa563151902bdb61448ec57190feb67a80a1eb0dbe96e911c87004e71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}