{
  "manageEntity": {
    "action": "Save",
    "entityId": "379850315",
    "entityType": "Track",
    "nonce": "0xa357a91d5c16d393d630cd990f6c070e40a778c4dbd873538364588e7d995bc2",
    "signature": "0xc71d99ec9b0d08016096cb1c5c9254909a4dfbceb86462aff8945cc21457a4a946826ff368d949b99bb844bcf3ab68c58dd09d47085c05fd08cd808040e767131c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}