{
  "manageEntity": {
    "action": "Save",
    "entityId": "127444932",
    "entityType": "Track",
    "nonce": "0x019b6489c442f7d0275428af820d88e690f9cf10cd32e1af479df7612d233855",
    "signature": "0x275b0b7d80b18478346180b2b7886aa2d251dccaf9bf8c8df4cf1c6a5c529f3528ba661d03e2463f221ccc36d301ee1ecb946d68a79b7159abfdbd4196662b251c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}