{
  "manageEntity": {
    "action": "Save",
    "entityId": "1611753158",
    "entityType": "Track",
    "nonce": "1786436648233878807",
    "signature": "0x9ecc5a35647ce906e7309f2596c03785d998f8b8b87ff41e5084d59ca6b959667e078f6c219fd381c87ba2a50fbc059721b231c2ffdb4af159ace803addfaddc1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}