{
  "manageEntity": {
    "action": "Save",
    "entityId": "578337292",
    "entityType": "Track",
    "nonce": "0x5dbe1509cacd15e6e46698e4da8a90d1c0f28fb086fa4302a0363e0e6f9afb7e",
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    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
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  }
}