{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348838786",
    "entityType": "Track",
    "nonce": "0x78304f2136919cbf3e7d323002889296110f37f5d39819487b90dca3319a791b",
    "signature": "0xa0c663f7ee53c2bd79a4364ea27ce32c711548f322392e5accd50744f0bbd22e314ef0a216fb98a440697f5281b1a0909bab2ad3b05039a053140e863e7ab6be1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}