{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075807",
    "entityType": "Track",
    "nonce": "0x394dcec42875dba0e5d168f43f6a16e93f7a7b4283c4b1ece63f71f0379d0821",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
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}