{
  "manageEntity": {
    "action": "Save",
    "entityId": "286717579",
    "entityType": "Track",
    "nonce": "0x9d6ea81104bc9427e550a679b832fd1d342cbc14ec48d8f95e41cbc2c576bb04",
    "signature": "0x45e699d1d5bd82c6d8bb7d3d2a980c6198247ae93e3c9d344907071655adf10b73bcbf867c5aa6325b927073e260407b920b997ea37055c4255ef3615eddc0221b",
    "signer": "0x868cDCaCaad507eE1eFBbDc02862A479cA5e1433",
    "userId": "614649001"
  }
}