{
  "manageEntity": {
    "action": "Save",
    "entityId": "265363",
    "entityType": "Track",
    "nonce": "0x43ef83d9dca4783e93f46fc5e32a3694ccb605d0e1524caccfb02f2a9ce9fdb3",
    "signature": "0xdabfa9a74b308c4afdee04e78bc080aa8c6ca0fdd25551c4c32aa506b19679312a7ce5cf973785a8d80e7ae2fd287f8239b9e5a83e4ac457a8966723b972f5401b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}