{
  "manageEntity": {
    "action": "Save",
    "entityId": "85521437",
    "entityType": "Track",
    "nonce": "0x7b54ad3d170092d7ab8f34b0ecb55a2712f1dd75a2e6e8dd284dc6a8215de403",
    "signature": "0x6ed3ba0e316044fd99eec558bcf0726aaaae2232ee71d6d196c33c6d9863f4eb1587f7726fc27abebe04932a99c9d4e067fcccfefaa7147e1a55e6ded125de421b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}