{
  "manageEntity": {
    "action": "Save",
    "entityId": "959457625",
    "entityType": "Track",
    "nonce": "0xde2fd2a2869698315f217919364084ae2a4ff6af2b92dfd9e90bde65919d3183",
    "signature": "0xbca9819d253ba198b49af494a8656b5886e088af43816fde078dd69d9ce8381e3435d9e8722f787b214bf226e2938adf005b7b624aa53a776e7eb7f2a97ee93d1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}