{
  "manageEntity": {
    "action": "Save",
    "entityId": "531610386",
    "entityType": "Track",
    "nonce": "0x4dd28a4a389e3b211c41a54c497987d9bbbffee021211353b0031a7cbb99a993",
    "signature": "0x14ae657797fac2ba0511c5f386439c2679e3b3fa82bc9013b055cda64f1916fb5c64ac9520a52679129846cdab4b3cf2cba71f3c392098b7475c7cc788b010af1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}