{
  "manageEntity": {
    "action": "Save",
    "entityId": "1889990373",
    "entityType": "Track",
    "nonce": "0x36295deb3b1cc172bd1a5d3d3dcd1dfb88d73045d3b52d34048703bfbcf02cc0",
    "signature": "0x27ed1fc70cd1b83776bac4cbd75f7ee0a8030e86122f773d6724f9a957b1230f63bd71110798c7658ff33bc26ea6166ed80898ffa1e6102d9bf6c3a12be862691b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}