{
  "manageEntity": {
    "action": "Save",
    "entityId": "368210",
    "entityType": "Track",
    "nonce": "0x8350de163dde133d091d30d56c8bed6ae3d744e8037dace9a1874bc375064abe",
    "signature": "0x6fbded5cf0e619b9303949cd38b0cbf0528763f81275c13aa33838a99af22a314847392ff65283260295eb6786c28fcaebf5227a4cc43d3de1a9783afebd6f3f1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}