{
  "manageEntity": {
    "action": "Save",
    "entityId": "428442",
    "entityType": "Track",
    "nonce": "0xf563abb5fd10126a4ff4e132e6089e1da45d953ee893a3db2e72adefebc2374e",
    "signature": "0xc4c1323643367a64227a48e44cb05e794700025b82e89acd99a8494479b59e8e4308ee30dde089044c68891f4fe224c8950201a2da853a008c9f1c4b2432f41d1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}