{
  "manageEntity": {
    "action": "Save",
    "entityId": "187671",
    "entityType": "Track",
    "nonce": "0x011f957d6310344b5546697ae29f1a72fb99e9805d8fd994f62051705ea68a07",
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    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
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  }
}