{
  "manageEntity": {
    "action": "Save",
    "entityId": "812811196",
    "entityType": "Track",
    "nonce": "0x537c6acd028340f7756c51a682d6bce0102ea4a3f0be45d8ce17c306213436f0",
    "signature": "0xb35f0c44054991df5b55966526d3581375dcad07296617f415fda5b5ff74db8e529c81c22688860eb3d27d9c947b37309ee5720dfa91a591c6154c25e627b9f31b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}