{
  "manageEntity": {
    "action": "Save",
    "entityId": "107707960",
    "entityType": "Track",
    "nonce": "0x6fea99a68931ff3288c1d68e964dc2a356dd90c01843ebc9cfeb82a9becf09e5",
    "signature": "0x239a16013b4885d3288f022add180374bd575e2ac76f98403211c5e29ff74cce1104281943a0f3416078300e8e85a55ab17af393e6277a06c2014c1d3b7fecea1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}