{
  "manageEntity": {
    "action": "Save",
    "entityId": "986297373",
    "entityType": "Track",
    "nonce": "0x814d275a6cd54618750ce54c0a0c5f975634f3d41058a065725932901b3b1fbf",
    "signature": "0x7809d181d828c14f4bcd7b84f8b11f813cb1a52bb691ca25a8c251aa6df4d60c436278ba12fd4e8fb5bbc5297e7b03fa51cc73ddad64d0a375cb60bfa82ac2ce1b",
    "signer": "0x2f890F488c7DE6221893B82B90bea73E2304cE3E",
    "userId": "344578316"
  }
}