{
  "manageEntity": {
    "action": "Save",
    "entityId": "573227133",
    "entityType": "Track",
    "nonce": "0x83e9107df6daf163195396fed851e233bda2150ecb3a1c5e4dc219349051a26c",
    "signature": "0x70f2f28c24eaa4e01fb6e20e45b2d33d2de60de5a6c4260baefb240a6ca8c5e911dd3c6b6eaddcf942f031dad15f148c3088c227589ac61e8d69f72384a0222d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}