{
  "manageEntity": {
    "action": "Save",
    "entityId": "425758914",
    "entityType": "Track",
    "nonce": "0x6fac9a5476d04210368407d7b2f91a9a3be8de7f6169a2497938e7ed225dece6",
    "signature": "0x08cf563cd48aede177c2468faf1d1631564122706cb96888e6fe6a4e4e0d4a5d1ac0b22c85b104d015c051ea79091ebbe2b9f0d31fc103ecf01117fb9d8159cb1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}