{
  "manageEntity": {
    "action": "Save",
    "entityId": "2141219813",
    "entityType": "Track",
    "nonce": "0xb35668d13da751720811dddfb69d2b8b26d05866c60a96c6a51c5d0bee7becfd",
    "signature": "0xb62c63489da2d8848956e256a9116a6e3b1e3bf89deb668bff8f696a10c600fc00c17ec86cc89911f8198e01b8bde019f57b7ae01d1d3c32b5ea50bb26b656db1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}