{
  "manageEntity": {
    "action": "Save",
    "entityId": "918324853",
    "entityType": "Track",
    "nonce": "0x2028880c652a43ce7298d36dc82b6d0fc6eaa3833005ba960cb8dd291236b7ae",
    "signature": "0x964ac76b6cc10bad69f7064399a0b904c7a0f1c998fcf9a6150bf52ec4c94752094a9c81b1af6e41f94433fa53c4136fc72743b1b8201313167af5840873049b1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}