{
  "manageEntity": {
    "action": "Save",
    "entityId": "393588717",
    "entityType": "Track",
    "nonce": "0x36e2ea7cf7312393194d96375a03262ae65fade6d863c81a05c76c34622fa525",
    "signature": "0x1bf5561f80f24d28301f286d45e7904100de5f75d425e935442d74bbdcb7dacd31413cc3a9b44a90c9daa680c740e9da27b37a9f5eba7ef9eb20f0bd4976e1481b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}