{
  "manageEntity": {
    "action": "Save",
    "entityId": "303083",
    "entityType": "Track",
    "nonce": "0xcb623a08774f3812ae920c1d1cb7e611274f5a0dcf6cb9b639e98852c585a9de",
    "signature": "0xcefaf6637982d8246ea157312129ff0af3feb7f9bad184d49b848ab63ee92a4c67ee2fc613fc3cf848708367eaad2adba84a3cae93edb767dda0621057598f811c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}