{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348265938",
    "entityType": "Track",
    "nonce": "0x11d3a0f8e3c8090dc0eb972cfafbc4f11cd4065512b68c3faf1719a8d7866d83",
    "signature": "0xb973766430b49f95e077257bd6f4d4109be4a6e547d13e212155b335755a12325ec1a11a6391b47b4f15f71460dbac5611185fbefb414b905568fca1af5e46671b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}