{
  "manageEntity": {
    "action": "Save",
    "entityId": "488260308",
    "entityType": "Track",
    "nonce": "0xe3d165c3a4f314a9b447dc3cf7157f427954ebd5de4ac1c276b06513f0b54323",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}