{
  "manageEntity": {
    "action": "Save",
    "entityId": "812625270",
    "entityType": "Track",
    "nonce": "0x8fbe73f4ce92a48159cc66e6dc74bebf1da76bc8f34cc86db8bfaae348412c8e",
    "signature": "0xcad2f4454885fbfbdb74bc8060ccb9bd425ac9b12bc5f58441700c9ca0b8984069f8f73ff30482296e1ebb0d8227f929f923b0ba335b4ad7962f821fe213c0751b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}