{
  "manageEntity": {
    "action": "Save",
    "entityId": "892952163",
    "entityType": "Track",
    "nonce": "0x19070005c58d98b259c59c24f349e5223546902114c827cb849c7e455f7473a3",
    "signature": "0x902482afc3c098aedf12448e1c9cdca60c9fbab6af7449f2c3e73c6402be07406f167bbc7c76549335261ecd335f51ffcc41b16c0d931570dbbd78733217be721c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}