{
  "manageEntity": {
    "action": "Save",
    "entityId": "142955",
    "entityType": "Track",
    "nonce": "0xcba3ab33242d676fb3a915ecdb64be66c4b0fe34cafb7f30cab3d6693bb801f9",
    "signature": "0x87023387454841b3fdffbfdac5f130f0dfacefea99f0339b7d0b65ba6b46d04940fb9c395a1f8f8f673be9a7a9740544a62ff5895ee90228676983957bc50b901c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}