{
  "manageEntity": {
    "action": "Save",
    "entityId": "1347734388",
    "entityType": "Track",
    "nonce": "0x8283c117de3bb46b79790d64a313d840dab878f8cfe73285d22dfb526319995e",
    "signature": "0xc338ad52f259a71ab9aba26f4c2a51e04a8390fb08964468b22ab90b96b0705e2b606d752a7d2a20b1e12ab42949f9eab03b1be11ffa6734c463149573a9866b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}