{
  "manageEntity": {
    "action": "Save",
    "entityId": "817506900",
    "entityType": "Track",
    "nonce": "0x072e23efcd4de623e171bd009769556905e63beb05955851111cc06d422caa16",
    "signature": "0xefb3ba7b38586ad4c2ead0822bb6d8bb7e6116fdb05af0bbd0bbd8e0490160387a87a69049303c86c1932fcaf5d7900bc3af1ca2528a6720d70109e0c73db8171b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}