{
  "manageEntity": {
    "action": "Save",
    "entityId": "1611177942",
    "entityType": "Track",
    "nonce": "1792521419458357580",
    "signature": "0x4a20d1cac5bbef52621afc879ee6898887465c51c8dd4a08a59ff15b4488d65610aca65409edfd6784e9354f9e170128f45ea0f5f10b1fb7df42a24605d747ec1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}