{
  "manageEntity": {
    "action": "Save",
    "entityId": "412011314",
    "entityType": "Track",
    "nonce": "0x45b6553c31d71bee13cafe651f3c072e9bc3a9a72249be142e4b74a426a43fdf",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}