{
  "manageEntity": {
    "action": "Save",
    "entityId": "1227801364",
    "entityType": "Track",
    "nonce": "0xce67472554c393331aa34a6c59d5d98d2750b09cbcb9579828edc45057931837",
    "signature": "0x9e9490c5663c8c75611b70b8c53a4c3ee98776d62984d81330d310af4780e0ff0fb6a12b2cbc82af1d46fb97de36ead4d4b4d5eb95b661b4d985619bc43cf54b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}