{
  "manageEntity": {
    "action": "Save",
    "entityId": "1433207356",
    "entityType": "Track",
    "nonce": "0x4cd3c8c7f89cf4d0e69f63271e1c268280f68971a921c721d224abd44cada7c6",
    "signature": "0x10d1efcf66a3b3598d0a9225f1eb31afda00cb241de81114563ab30762a003ae31143dc0d25edd3785509127c68c6db221d4d14ca898027e4a8b5aefadd504c81b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}