{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050220956",
    "entityType": "Track",
    "nonce": "0x4c9efa8acfe46f115ad28e89f729d4281a4fdae988274d2d854d3a69f82d8327",
    "signature": "0xa7cc602af1c806009da30194b8bb40a7791bd8e1352575fed9bbaa79e0cc45f4345500d20421ee5c068dd10d09d524751388db4262afa979a70c4c79796c8fc81c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}