{
  "manageEntity": {
    "action": "Save",
    "entityId": "267929",
    "entityType": "Track",
    "nonce": "0xf6462d43f131febfef15e6f645fa864517919b0d73e68d85eb7e73acf242d86c",
    "signature": "0x2ab88ec3ba6afad27d76b4bd943f827d39e13cef83d73f8a79572c2c8b2947fe46dd1b9b96b6832d3fb03f28644eadc0482c883cff4e1a0bc727262767d7fc471b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}