{
  "manageEntity": {
    "action": "Save",
    "entityId": "117780",
    "entityType": "Track",
    "nonce": "0x5f6b4a947cb5e4e84c78f6f524a59f689e756a3a75b047937a2dd960c30b3cd4",
    "signature": "0x9de9c643eaf86dbd22fadfebab5819238666c1617b6e729f83c235b18acc23485b5d29cee8b659f1610646c145b4aa0f63853634573707f5797383c9e7da5adc1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}