{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019374",
    "entityType": "Track",
    "nonce": "0x9af9bfca9a16592ecf00d00ee886fa4f70b69035f3bbc6c5623068c05167e693",
    "signature": "0xdc456fb95c3866d1a8310a233cf14fb17a64c1720f3ac992e7894d38f7b1d1d348486b6fa7c68f91173415a7a9e3bd82ca81326cab154c1f7b8064056821a62c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}