{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128412",
    "entityType": "Track",
    "nonce": "0x3add6b8aa12adb6ed336c7a5a3393b837fcaa6e428fff9636280ec311dfe1e35",
    "signature": "0xafa52d732694cdc46674b4ac81d0fcb1ee6f9e39389f4e4a8c9c11e07b19de2d7fe62c23e1f5f831abc2dbab830cfd321b96478767e761220647ed423eb75ede1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}