{
  "manageEntity": {
    "action": "Save",
    "entityId": "884497171",
    "entityType": "Track",
    "nonce": "0xe3e411c4f581ae6f627b970ffe04a582eed9310efe1a3a872f0473d0dba9401c",
    "signature": "0x47faf711bd388354215984cb4e2045525718aa2f8b9fd45c4e6dfd8ec353775536d5e57b5adf159ca063fa54f1cebf10d823b4cfc1df343f082b2ea61bfeabfd1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}