{
  "manageEntity": {
    "action": "Save",
    "entityId": "225822821",
    "entityType": "Track",
    "nonce": "0xc099cdad59e092a8c71d2e6d8e5b2ef7be75baadb2fb0c6d78f97e803b76b6c9",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}