{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940066847",
    "entityType": "Track",
    "nonce": "0x334455827e473c9abba8919b35b63774515414cd7f0464dbbdd95614f6df0d35",
    "signature": "0x3e52f031bd31a72d4e7b682744ef197bcaabb1f49e8b4926a91a4552fde22a032c4b673311304248f7bbae01ed7627f2fd77cba710b6185e23e0d46a342f78f51b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}