{
  "manageEntity": {
    "action": "Save",
    "entityId": "697048",
    "entityType": "Track",
    "nonce": "0xbfb8bff419782a1c0cb1677f7a4694ed9906b07c156f132bc40744d971eed0d9",
    "signature": "0x6ed45fd30b0eabd70a4ed265e718e6eeffdc408bd90fe9e7bdda953da7d5833935891aea0646ec16a07b93cfa860bea85da37f4d22063eb9e62a7d01fa2b6e5e1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}