{
  "manageEntity": {
    "action": "Save",
    "entityId": "917931610",
    "entityType": "Track",
    "nonce": "0xe0d896096e9868d8415fba9c1f50d234435695a3589f11a5254843e18dc99a50",
    "signature": "0x5e994b4ec13f6a536fe40feefc9cb627d0b52d5e08637ea6dbdce0746ee6d41270f55f7133f3bfcce6bcb5c4c863e0edd188a45d0e5ce175b5eacfe53442f4411c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}