{
  "manageEntity": {
    "action": "Save",
    "entityId": "591080",
    "entityType": "Track",
    "nonce": "0xb3f5ee1e4a612512a5d56ef9dede5ce30a497a7875fce75162b32da78e48faae",
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    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}