{
  "manageEntity": {
    "action": "Save",
    "entityId": "320621800",
    "entityType": "Track",
    "nonce": "0x9195222fae8bb4e41e4bd976eecca9f70799173753c5554746a485ea56588b42",
    "signature": "0xa6d0652b44e95981779f75e0d8d942615c4c56b8d76532552fcb6791e091de9c0456e51085de8c0b3f2f866d198e0ec1b20caba3983c1ca6aa99e59eb2eb22f11c",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}