{
  "manageEntity": {
    "action": "Save",
    "entityId": "181343479",
    "entityType": "Track",
    "nonce": "0x373a10d763e0f230d3566a137480efdc3650445e2d704663ec8222406555eb9d",
    "signature": "0x978bc60321435cfcdd2086fdb1e75ac55e8e190cde2dc91fa665bddbdf6477be5308cdddd43c7ea7e0936a788e69c1073a2229856427cc71bfded7d14e4492611b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}