{
  "manageEntity": {
    "action": "Save",
    "entityId": "334647966",
    "entityType": "Track",
    "nonce": "0xa8de2107ee145d0f2246796ff5d0e2c4fa9abaea44d055b3ee0eea26a50b460c",
    "signature": "0x759452a39c4ea86bfb557605eb89d26d35d625ca257bfe225b4cc6950127dffb34e0fa49778d76664847de9f572c71a29e404a77661f7a5d082d78de410d66cf1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}