{
  "manageEntity": {
    "action": "Save",
    "entityId": "599604",
    "entityType": "Track",
    "nonce": "0x7ffc067f462c7c601f5aa5eaf64c86775cff1694b75d5272302f6cadd366df7d",
    "signature": "0x6043ff06034237324ffad01bb1ffc8eaa69bb2f98e92888039fa0fc496f24ea716a3d7d5fff8d770c875f6e7b351e39fb31ac4ee3eedffa2b13ef50908c7fc091b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}