{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764416637",
    "entityType": "Track",
    "nonce": "0x999be2f440bc2be0c506c46ee925373c60a81d2f38af722e9f0d9d057bb26a3c",
    "signature": "0xc3149d1aeb2a2151cd0b0995d45c26580605ff0cda8cd9a145c1a979fdc95e83592b045c2c23cd500c1b2e3b31306a22a4c9265712680cac9b99ba909b96d0561c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}