{
  "manageEntity": {
    "action": "Save",
    "entityId": "805994498",
    "entityType": "Track",
    "nonce": "0x30b597290e1695330013a437ffed1857aa910f0b337482ba50bcb5984c8e211f",
    "signature": "0xfcb33031a7c9614822ce2fcb76194f8a965f7779c4faa885b270370da3b61da911597431199c79c9bcd058c4dd93258947d5b29491765c7737ec6a4a8b0dda801c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}