{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514627988",
    "entityType": "Track",
    "nonce": "1792451334282431920",
    "signature": "0x71c79c9c5904cc8ea4b2fd2e7e35da434e34b99568bc1c0f4e0e409dab2c581d6381dee112fed171571fedff1d01096747d0841890eb601f482b006a5010a7d61b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}