{
  "manageEntity": {
    "action": "Save",
    "entityId": "1558339192",
    "entityType": "Track",
    "nonce": "0x15d102b9a937f1342b77de15ea6a1b45c974d995558da3271266745cacbe1d99",
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    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
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  }
}