{
  "manageEntity": {
    "action": "Save",
    "entityId": "31625606",
    "entityType": "Track",
    "nonce": "0x37d4c6a19b4c0a04c4e8d437719fc494a827471f0f40f63e4fc6d89f6b658673",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}