{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150830828",
    "entityType": "Track",
    "nonce": "0x3959422037cc0c49f830fcbf80fad7052c5778f4cf49aee3a9cc1339ab8a620c",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
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}