{
  "manageEntity": {
    "action": "Save",
    "entityId": "224806",
    "entityType": "Track",
    "nonce": "0x81789d77a0f86dc5d357f8eb6865b573098cd7e278b4e241296743b5a6c772ce",
    "signature": "0xee96356eea4f39540cd5e1f080ed98ca6ea52dee02de59f7e1bc53fd51afaa8211a0cd3b58b4b635cc859e0e7ffb83f51db265eb699284f36cf2015d2cb52ae31c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}