{
  "manageEntity": {
    "action": "Save",
    "entityId": "81237",
    "entityType": "Track",
    "nonce": "0x794ddcdaf07d9e92e4f313236e259bcd07373af484ee9b33ad38aa48b4d73c40",
    "signature": "0x15ff090a5613bc45d7bb4391eee6eb174030b452a2186bc7f3e440cac248d1cb591edca997e08503bb256168d0d95f84a6f1f00ddeaca53c4fe94f503fc74be81b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}