{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115726294",
    "entityType": "Track",
    "nonce": "0x940fb293d2defd6c6452d61a899fa3a7a84e4ee142a25941684252bc1fadc032",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}