{
  "manageEntity": {
    "action": "Save",
    "entityId": "234538001",
    "entityType": "Track",
    "nonce": "0x004c4e1cba182e71ece3bf1448e105002dfacb356792c79d7cd5b3d13a82ef11",
    "signature": "0x5544229d382329f0fe4fdf5742703851e0e3d34e9d3f288e109d81cceb2a058e129c89cf2ff8007334902eee1b42de68461c72829600cc0961217cf225a186041b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}