{
  "manageEntity": {
    "action": "Save",
    "entityId": "324141040",
    "entityType": "Track",
    "nonce": "0x9384d088b58c23fae753294ae3e65e21ce7b37552fa52f857e4becc844993f10",
    "signature": "0x2210dc6ca48ca5f563dbaa3876fc52552e6ecdb7d45be64dae0fccc00ac7407d68d5923bbf605e11836e9f1fd464917f15a122e2cf0d7038ee1f82d5a67c27531c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}