{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235764825",
    "entityType": "Track",
    "nonce": "0xf9b44c99b316ca3d6eaa1ac73bed13c7e0d1aa4b6f00bebfdaf1dd65146dab7e",
    "signature": "0xd81fffb8305b860774dacc2c81e347fb427aca88006112496e6bdf5676da60e736197dbc27c24f88243b7e1c6c644cbc313bac909b2662cd2b800809f7248a421b",
    "signer": "0xc28F39d473d5C4cacc612630A8798a119D1Bb506",
    "userId": "901788935"
  }
}