{
  "manageEntity": {
    "action": "Save",
    "entityId": "558360694",
    "entityType": "Track",
    "nonce": "0xcb562dbdfe43b8ef5ca4af788cc7d1c0c331aee9a069683430660305b9e7f1b6",
    "signature": "0x98fbeca6019e79841a70e0b1cc864dc65c9c0aac3f7d9c6b4cb3e66a3e8aea482c9f3415740ceab0164da3fd2c868fc7274c14f12ce2cf14db8414d272479e8c1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}