{
  "manageEntity": {
    "action": "Save",
    "entityId": "1890837960",
    "entityType": "Track",
    "nonce": "0xf81a0ba41337eb12ddbba4ca12498c3395b4cc17b87e7166ba73eb91dbc41940",
    "signature": "0x3a83a9982bf78f2f2665e5c350986b982b828f8c0c8c4aff92a5dd9e8c48eeff64b71c562969ee5a3b8dbfe3506b9a6ab79b70e98392520ae6171c9d3ed366591c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}