{
  "manageEntity": {
    "action": "Save",
    "entityId": "1839036032",
    "entityType": "Track",
    "nonce": "0xee2cff6825144f2c481fef25b9633028bab030b029d5caf2bb9d3da127ba2760",
    "signature": "0x3912749fefb714fe07fee44019b448d31b06874291319320384bc3f811bde875077e783e75cbf7cb76163c8ba7d3af44baa3f2bf08e77d54c2502fb4ee53b4d91b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}