{
  "manageEntity": {
    "action": "Save",
    "entityId": "970556",
    "entityType": "Track",
    "nonce": "0x1070a35e6f69127ae26a6c507edc55d052687c7eb29bf40414a8462552010dde",
    "signature": "0x80177a82f49d9a94e52d79a2540416c950f108621fb572f957554c9e918a4fcb2b3b1654b7e04be63f7ffe3daea40b0d0642961a97db1483105e4534adb2975d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}