{
  "manageEntity": {
    "action": "Save",
    "entityId": "492150625",
    "entityType": "Track",
    "nonce": "0x4f9f4faa14e00cc68b84e3cc96b25de493a88d60492139c29a40c4398f430b17",
    "signature": "0x36a9409b430008a84b95c03ae08db80d5b19b29cae7b1ec2c74dbfc6daa2da2740def6d6244131697ef7dcf50322c69fff6ad691cf4d0df6e92d98666a7733ab1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}