{
  "manageEntity": {
    "action": "Save",
    "entityId": "1880094193",
    "entityType": "Track",
    "nonce": "0x1301f8891cc7f87de1d8d1813542c1d567ff9c9c8fd9a02b8ba241ecbf6e3b21",
    "signature": "0xfb8b9e3dc6aa436fc1f7ed7c0ca883b74b3354b6c9c388a33e13447f7324d96b0d5bf95976e72d84e47473f9ad5660c58cdecf66fb377688b242ece8d408b50b1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}