{
  "manageEntity": {
    "action": "Save",
    "entityId": "564205303",
    "entityType": "Track",
    "nonce": "0x6e39b299b75d6c56580076c538818c61566bd2110552116bb92de3c87ed4bdd6",
    "signature": "0x1f4c5b26252db7cebf291629b81ba687d7120ae54b457cf19bc265a2abcb2de9364c498aa2df6f2fe1756a877a120ab82fe93f5c498bfa4f4056a4ff7b63dcad1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}