{
  "manageEntity": {
    "action": "Save",
    "entityId": "654957572",
    "entityType": "Track",
    "nonce": "0x29457b5cd0e94aa047b4c440f3993157ec16443d2384443b0ac126302faff54c",
    "signature": "0x96e2f43835abe2ceeedee40913d21df27743384edaa999eb7cb5924e08638a2e2b5791220076126335ed5cd3ebd80141724255d79ba5371a7c344b64720469561b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}