{
  "manageEntity": {
    "action": "Save",
    "entityId": "1690668105",
    "entityType": "Track",
    "nonce": "0x1bf41bcabc8b5e3d36371307c36bcf8ea254728b4b68233ad969b998bd6906fa",
    "signature": "0x06d6eb07fef28caf13d8019136fe321fde20016f2a38e96788a24c91d94cbb2c5600b3e48ff1677217502e64a7926d9a1f70288047b8f60b42b25d2b26f342491c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}