{
  "manageEntity": {
    "action": "Save",
    "entityId": "43623859",
    "entityType": "Track",
    "nonce": "0x56038cfe6b8e3302b1ea1a09e63e71bf56c12d1551a897bba7b3796ed5c1ff76",
    "signature": "0x8cbbf75ffc4a0677b9f9f29267a377e655beb45055424272163726aaf120d5ca141d90fb368db6ae0ab0d2599383da7053e3fbd65902312c1696f9dcfcaeea291b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}