{
  "manageEntity": {
    "action": "Save",
    "entityId": "358161959",
    "entityType": "Track",
    "nonce": "0xcd9ca8bc7dfdec2ab1575cde0bcca1c7e336ed4de8ebb4e50b14b1d064a477d5",
    "signature": "0x943a0776fb360948ac137999dcc807082ce81d3ca1eba410752a059fc82d6ac47cf5fec8cdc74b812a44a42295be488422ab93bb6518cc87e72e2246d9fe8ecd1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}