{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138569603",
    "entityType": "Track",
    "nonce": "0x0c4c10bbdbc4be27861524ef0a9f4a8c5c05393daa524c4bb326d4ab7b98e37d",
    "signature": "0x1edad3e25902784099a058f803f4f68a1b26fe6e757958d6b5e9562fe67d6f29327266d2597505725e8a5bce1b39cf82528f0663805560f8e43025c7bdbfa73f1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}