{
  "manageEntity": {
    "action": "Save",
    "entityId": "882989293",
    "entityType": "Track",
    "nonce": "0x8cb98005780a1912fddb26e04b478f549edb65250c92ca06270dfc83180a87d0",
    "signature": "0x5556a30e000fa40ff9da84f9b08521f118e16ad536e47892de70c496a819c6cd68e24692cfa7d79f60a6ddd6c852dec8b058acc7b1dab8c75e2c4b05085368d41b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}