{
  "manageEntity": {
    "action": "Save",
    "entityId": "578784565",
    "entityType": "Track",
    "nonce": "0x27e5b1ccf6c76da120a29635e11513fbddca8b2298823b3b9c0d87f31af55f1d",
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    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
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  }
}