{
  "manageEntity": {
    "action": "Save",
    "entityId": "238893704",
    "entityType": "Track",
    "nonce": "0xf4af963bacb2dabde9b66e85e1ed01720a27f49cef7e36d503da0a4b5868471d",
    "signature": "0x96ace0d01945256905369e92cc19770bad38de61ad64e631f66490c88ea20c6326a2cc04c379b50e550dfeb9ca864f75b1951ae0ff02c298059501492c60d7131b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}