{
  "manageEntity": {
    "action": "Save",
    "entityId": "238747",
    "entityType": "Track",
    "nonce": "0x3443b6f3f44b7e09a98437985571a7d70f1532a2f44189d58ca3ff8b4fb20c10",
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    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}