{
  "manageEntity": {
    "action": "Save",
    "entityId": "906721304",
    "entityType": "Track",
    "nonce": "0x88c2c56fb79021bc0bc85e5d43a9eb1a041b2cef37f522ba938bd2e0f1e33d21",
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    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}