{
  "manageEntity": {
    "action": "Save",
    "entityId": "126324206",
    "entityType": "Track",
    "nonce": "0xa89aa4eafbfd4176fb761fdaac0abc560c481a4f12e64f8f7511211bdbfc1dd0",
    "signature": "0xf6b7a5e03f0a24ded9e3a4b721553f829a98a6f72fbd23beeb60ef40dee80d284390f40fb4448769fe1b971749d578967d47f5e3fff26dfe8c9032e47e63c2931b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}