{
  "manageEntity": {
    "action": "Save",
    "entityId": "234874000",
    "entityType": "Track",
    "nonce": "0xa9f9641b4a9342e44aad6c64d2d72a34b058610fab7e70bd93cdb506fa593d67",
    "signature": "0x5edcb3d2806176bcbc3c2c6402266e2bdf3f2b58c7b57fea2117ccea1c079bb64e6870132d0bb69369927415fa30f6f5f3477911bca917c50650add7ee37675b1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}