{
  "manageEntity": {
    "action": "Save",
    "entityId": "328638",
    "entityType": "Track",
    "nonce": "0x4a70f70711a049e09e7b0b99c6a588cd7d75e14b0eb4c6c28cd7466ad53a5160",
    "signature": "0x4ff030a048065eb44b521d6919d88c2683da481f9fa073dee2b44681326cf2aa05b2363473b05d36bdb391ed415114a88643c93825154198f610e49618364ba61c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}