{
  "manageEntity": {
    "action": "Save",
    "entityId": "564898",
    "entityType": "Track",
    "nonce": "0x40404a37a09377e409f401c84337f1e0978c625b2f4a5e174aee46064caa730d",
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    "signer": "0x4596Af3c2C6431486ddFC282464aFfA4d54a3845",
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}