{
  "manageEntity": {
    "action": "Save",
    "entityId": "359384528",
    "entityType": "Track",
    "nonce": "0x5de07abc2885d18dc8b300e01f3ed7f60ace6027ef8ee8d27e7fcbf503f6065a",
    "signature": "0x3df23a447a0fb9d4d18ab0b863454ac8c838b77102a7af62e1a927da68224a6d458259510f636f5fff7197f024f8dec84f31456b63699da18c3b4129525e99221b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}