{
  "manageEntity": {
    "action": "Save",
    "entityId": "367978847",
    "entityType": "Track",
    "nonce": "0x05507c68756fd16f5b31f4fb70b095e213729ffc8faf1fc0103e8d8ae789b443",
    "signature": "0x77bdfae3001a2eb23d7cedc2380ec16fe310b7f6843220eee0586fbf3195554e5c91138126fa2d9e7045faf95a159b67eaac0e0c7e450b568b3ade8a5f2947581c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}