{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814752936",
    "entityType": "Track",
    "nonce": "0x3cc98d8a40e9729f543332f7536b0f773db23e44f9a9034add9607e190aef16d",
    "signature": "0x814bc715d7bdf3a0d971ca1531326c37d31100d6399e6f8e4ced93d1a0a0b9f033da28d746eb55127d87765cfc02a258017423fc1a8e76d86bebb0d014b526471b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}