{
  "manageEntity": {
    "action": "Save",
    "entityId": "298228556",
    "entityType": "Track",
    "nonce": "0xf95def35105396a3b582ce93d9adfb1af04c7d0009b9ec7ade12ef38bce70352",
    "signature": "0x250a3b557ccb5bbaffe7857ac5b3c83123eb211320d5b9d8b6bce86668dbe3d502844ed8e5df379f99492105c44e2538b44310d03de279cef83154a6746f642f1c",
    "signer": "0x8c3aa6cf594458763078BFd2ef8282051A8DBC16",
    "userId": "576672259"
  }
}