{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988885497",
    "entityType": "Track",
    "nonce": "0x658eb371c2f58e74ab05118f4cb1ae12a07c9f13febf7c92b5d4f8a6c59626aa",
    "signature": "0xd9cd9c5210481f59cdff54bd3979df1aa41596d6cedb283ad83882b7d49e5f287286ee1fe8fcc3fe6a3695fb23f50f57a80f60ae91995174dc25920dd11fc27c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}