{
  "manageEntity": {
    "action": "Save",
    "entityId": "384894",
    "entityType": "Track",
    "nonce": "0xc525761fd4193ce25593cb2b0ef882593451e59a2dd768d6d301ba184a0307cd",
    "signature": "0x26a3c324e3062bd48c8e20ef659da171a4f31f7749c6da476224c8dd1eb1b35149aa318e4cf18270d0a693ac16677f344efaa89434ac18b941df8518753202481c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}